<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=11"/>
<meta name="generator" content="Doxygen 1.9.4"/>
<meta name="viewport" content="width=device-width, initial-scale=1"/>
<title>Flow-IPC: transport/sync_io/detail/blob_stream_mq_rcv_impl.hpp Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="dynsections.js"></script>
<link href="search/search.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="search/searchdata.js"></script>
<script type="text/javascript" src="search/search.js"></script>
<link href="doxygen.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
 <tbody>
 <tr id="projectrow">
  <td id="projectalign">
   <div id="projectname">Flow-IPC<span id="projectnumber">&#160;1.0.2</span>
   </div>
   <div id="projectbrief">Flow-IPC project: Full implementation reference.</div>
  </td>
 </tr>
 </tbody>
</table>
</div>
<!-- end header part -->
<!-- Generated by Doxygen 1.9.4 -->
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&amp;dn=expat.txt MIT */
var searchBox = new SearchBox("searchBox", "search",'Search','.html');
/* @license-end */
</script>
<script type="text/javascript" src="menudata.js"></script>
<script type="text/javascript" src="menu.js"></script>
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&amp;dn=expat.txt MIT */
$(function() {
  initMenu('',true,false,'search.php','Search');
  $(document).ready(function() { init_search(); });
});
/* @license-end */
</script>
<div id="main-nav"></div>
<!-- window showing the filter options -->
<div id="MSearchSelectWindow"
     onmouseover="return searchBox.OnSearchSelectShow()"
     onmouseout="return searchBox.OnSearchSelectHide()"
     onkeydown="return searchBox.OnSearchSelectKey(event)">
</div>

<!-- iframe showing the search results (closed by default) -->
<div id="MSearchResultsWindow">
<iframe src="javascript:void(0)" frameborder="0" 
        name="MSearchResults" id="MSearchResults">
</iframe>
</div>

<div id="nav-path" class="navpath">
  <ul>
<li class="navelem"><a class="el" href="dir_0c017496b493ff066fbbe686970307ba.html">transport</a></li><li class="navelem"><a class="el" href="dir_00580eb0cf40d799755587f5d56ed1cf.html">sync_io</a></li><li class="navelem"><a class="el" href="dir_51213d4cdf375ab846ee07ea55bdba59.html">detail</a></li>  </ul>
</div>
</div><!-- top -->
<div class="header">
  <div class="headertitle"><div class="title">blob_stream_mq_rcv_impl.hpp</div></div>
</div><!--header-->
<div class="contents">
<a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span><span class="comment">/* Flow-IPC: Core</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno">    2</span><span class="comment"> * Copyright 2023 Akamai Technologies, Inc.</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno">    3</span><span class="comment"> *</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno">    4</span><span class="comment"> * Licensed under the Apache License, Version 2.0 (the</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno">    5</span><span class="comment"> * &quot;License&quot;); you may not use this file except in</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno">    6</span><span class="comment"> * compliance with the License.  You may obtain a copy</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno">    7</span><span class="comment"> * of the License at</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span><span class="comment"> *</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno">    9</span><span class="comment"> *   https://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span><span class="comment"> *</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno">   11</span><span class="comment"> * Unless required by applicable law or agreed to in</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno">   12</span><span class="comment"> * writing, software distributed under the License is</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno">   13</span><span class="comment"> * distributed on an &quot;AS IS&quot; BASIS, WITHOUT WARRANTIES OR</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno">   14</span><span class="comment"> * CONDITIONS OF ANY KIND, either express or implied.</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno">   15</span><span class="comment"> * See the License for the specific language governing</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno">   16</span><span class="comment"> * permissions and limitations under the License. */</span></div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno">   17</span><span class="comment"></span> </div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno">   18</span><span class="comment">/// @file</span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno">   19</span><span class="comment"></span><span class="preprocessor">#pragma once</span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno">   20</span> </div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno">   21</span><span class="preprocessor">#include &quot;<a class="code" href="protocol__negotiator_8hpp.html">ipc/transport/protocol_negotiator.hpp</a>&quot;</span></div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno">   22</span><span class="preprocessor">#include &quot;<a class="code" href="blob__stream__mq__impl_8hpp.html">ipc/transport/detail/blob_stream_mq_impl.hpp</a>&quot;</span></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno">   23</span><span class="preprocessor">#include &quot;<a class="code" href="timer__ev__emitter_8hpp.html">ipc/util/sync_io/detail/timer_ev_emitter.hpp</a>&quot;</span></div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno">   24</span><span class="preprocessor">#include &quot;<a class="code" href="sync__io__fwd_8hpp.html">ipc/util/sync_io/sync_io_fwd.hpp</a>&quot;</span></div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno">   25</span><span class="preprocessor">#include &quot;<a class="code" href="util_8hpp.html">ipc/util/detail/util.hpp</a>&quot;</span></div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno">   26</span><span class="preprocessor">#include &lt;flow/async/single_thread_task_loop.hpp&gt;</span></div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno">   27</span><span class="preprocessor">#include &lt;flow/error/error.hpp&gt;</span></div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno">   28</span> </div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno">   29</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceipc_1_1transport_1_1sync__io.html">ipc::transport::sync_io</a></div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno">   30</span>{</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno">   31</span> </div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno">   32</span><span class="comment">// Types.</span></div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno">   33</span><span class="comment"></span> </div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno">   34</span><span class="comment">/**</span></div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno">   35</span><span class="comment"> * Internal, non-movable pImpl-lite implementation of sync_io::Blob_stream_mq_receiver class template.</span></div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno">   36</span><span class="comment"> * In and of itself it would have been directly and publicly usable; however Blob_stream_mq_receiver adds move semantics</span></div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno">   37</span><span class="comment"> * which are essential to cooperation with the rest of the API, Channel in particular.</span></div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span><span class="comment"> *</span></div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno">   39</span><span class="comment"> * @see All discussion of the public API is in Blob_stream_mq_receiver doc header; that class template forwards to this</span></div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno">   40</span><span class="comment"> *      one.  All discussion of pImpl-lite-related notions is also there.  See that doc header first please.  Then come</span></div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno">   41</span><span class="comment"> *      back here.</span></div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno">   42</span><span class="comment"> *</span></div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno">   43</span><span class="comment"> * ### Impl design ###</span></div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno">   44</span><span class="comment"> * See sync_io::Blob_stream_mq_sender_impl.  The same notes apply.  That isn&#39;t to say our algorithm is the same</span></div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno">   45</span><span class="comment"> * at all: we are receiving; they are sending.  However, obviously, they speak the same protocol.  And beyond that</span></div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno">   46</span><span class="comment"> * it is again about (1) understanding the `sync_io` pattern (util::sync_io doc header) and (2) jumping into the code.</span></div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno">   47</span><span class="comment"> *</span></div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span><span class="comment"> * Again, for that last part, we recommend starting with the data member doc headers.</span></div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span><span class="comment"> *</span></div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno">   50</span><span class="comment"> * ### Protocol negotiation ###</span></div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno">   51</span><span class="comment"> * Do see the same-named section in sync_io::Blob_stream_mq_sender_impl doc header.  Naturally again we&#39;re mirroring</span></div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno">   52</span><span class="comment"> * the same protocol; but we&#39;re receiving; they&#39;re sending.  Due to the latter difference, though, a couple additional</span></div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno">   53</span><span class="comment"> * notes:</span></div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span><span class="comment"> *   - We are the guy receiving the preceding-all-messages message containing the opposing side&#39;s preferred (highest)</span></div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno">   55</span><span class="comment"> *     protocol version.  As of this writing we only speak v1, but they might speak a range -- including or</span></div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno">   56</span><span class="comment"> *     excluding it.  However our Protocol_negotiator takes care of all that; and we only need to add logic to</span></div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno">   57</span><span class="comment"> *     emit fatal error, if Protocol_negotiator reports that we&#39;re incompatible with opposing side.</span></div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno">   58</span><span class="comment"> *     - Having gotten past that without error, we simply then speak the only version we know how (v1).</span></div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno">   59</span><span class="comment"> *   - Since only protocol v1 exists as of this writing, there&#39;s no need yet for an API to signal a partner</span></div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno">   60</span><span class="comment"> *     MQ-sender object of the negotiated protocol version, once we have it.  As noted in</span></div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno">   61</span><span class="comment"> *     sync_io::Blob_stream_mq_sender_impl doc header, that may change in the future.</span></div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno">   62</span><span class="comment"> *</span></div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno">   63</span><span class="comment"> * @note We suggest that if version 2, etc., is/are added, then the above notes be kept more or less intact; then</span></div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno">   64</span><span class="comment"> *       add updates to show changes.  This will provide a good overview of how the protocol evolved; and our</span></div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno">   65</span><span class="comment"> *       backwards-compatibility story (even if we decide to have no backwards-compatibility).</span></div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno">   66</span><span class="comment"> *</span></div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno">   67</span><span class="comment"> * @tparam Persistent_mq_handle</span></div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno">   68</span><span class="comment"> *         See Persistent_mq_handle concept doc header.</span></div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno">   69</span><span class="comment"> */</span></div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno">   70</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Persistent_mq_handle&gt;</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html">   71</a></span><span class="keyword">class </span><a class="code hl_class" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html">Blob_stream_mq_receiver_impl</a> :</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno">   72</span>  <span class="keyword">public</span> <a class="code hl_class" href="classipc_1_1transport_1_1Blob__stream__mq__base__impl.html">Blob_stream_mq_base_impl</a>&lt;Persistent_mq_handle&gt;,</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno">   73</span>  <span class="keyword">public</span> flow::log::Log_context,</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno">   74</span>  <span class="keyword">private</span> boost::noncopyable <span class="comment">// And non-movable.</span></div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno">   75</span>{</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno">   76</span><span class="keyword">public</span>:</div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno">   77</span>  <span class="comment">// Types.</span></div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno">   78</span><span class="comment"></span> </div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno">   79</span><span class="comment">  /// Short-hand for our base with `static` goodies at least.</span></div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ac3d293643835e752560de34116554624">   80</a></span><span class="comment"></span>  <span class="keyword">using </span><a class="code hl_class" href="classipc_1_1transport_1_1Blob__stream__mq__base__impl.html">Base</a> = <a class="code hl_class" href="classipc_1_1transport_1_1Blob__stream__mq__base__impl.html">Blob_stream_mq_base_impl&lt;Persistent_mq_handle&gt;</a>;</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno">   81</span><span class="comment"></span> </div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno">   82</span><span class="comment">  /// Short-hand for template arg for underlying MQ handle type.</span></div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a465dcd2a80871028ba8a97402be1cf2a">   83</a></span><span class="comment"></span>  <span class="keyword">using </span><a class="code hl_class" href="classipc_1_1transport_1_1Persistent__mq__handle.html">Mq</a> = <span class="keyword">typename</span> <a class="code hl_typedef" href="classipc_1_1transport_1_1Blob__stream__mq__base__impl.html#a8fac0ed5fff23aa42e0a601db6fee42d">Base::Mq</a>;</div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno">   84</span> </div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno">   85</span>  <span class="comment">// Constructors/destructor.</span></div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno">   86</span><span class="comment"></span> </div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno">   87</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno">   88</span><span class="comment">   * See Blob_stream_mq_receiver counterpart.</span></div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno">   89</span><span class="comment">   *</span></div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno">   90</span><span class="comment">   * @param logger_ptr</span></div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno">   91</span><span class="comment">   *        See Blob_stream_mq_receiver counterpart.</span></div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno">   92</span><span class="comment">   * @param mq_moved</span></div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno">   93</span><span class="comment">   *        See Blob_stream_mq_receiver counterpart.</span></div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno">   94</span><span class="comment">   * @param nickname_str</span></div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno">   95</span><span class="comment">   *        See Blob_stream_mq_receiver counterpart.</span></div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno">   96</span><span class="comment">   * @param err_code</span></div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno">   97</span><span class="comment">   *        See Blob_stream_mq_receiver counterpart.</span></div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno">   98</span><span class="comment">   */</span></div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno">   99</span>  <span class="keyword">explicit</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a3e1c13dc986985621ab05de16f9e811c">Blob_stream_mq_receiver_impl</a>(flow::log::Logger* logger_ptr, <a class="code hl_typedef" href="namespaceipc_1_1util.html#ae6ac47812a90d1287c61e0b7de7bc4f5">util::String_view</a> nickname_str,</div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno">  100</span>                                        <a class="code hl_class" href="classipc_1_1transport_1_1Persistent__mq__handle.html">Mq</a>&amp;&amp; mq_moved, <a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a>* err_code);</div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno">  101</span><span class="comment"></span> </div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno">  102</span><span class="comment">  /// See Blob_stream_mq_receiver counterpart.</span></div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno">  103</span><span class="comment"></span>  <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a08712e065d9a6778a0bb18de94009f22">~Blob_stream_mq_receiver_impl</a>();</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno">  104</span> </div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno">  105</span>  <span class="comment">// Methods.</span></div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno">  106</span><span class="comment"></span> </div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno">  107</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno">  108</span><span class="comment">   * See Blob_stream_mq_receiver counterpart.</span></div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno">  109</span><span class="comment">   *</span></div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno">  110</span><span class="comment">   * @tparam Create_ev_wait_hndl_func</span></div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno">  111</span><span class="comment">   *         See Blob_stream_mq_receiver counterpart.</span></div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno">  112</span><span class="comment">   * @param create_ev_wait_hndl_func</span></div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno">  113</span><span class="comment">   *        See Blob_stream_mq_receiver counterpart.</span></div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno">  114</span><span class="comment">   * @return See Blob_stream_mq_receiver counterpart.</span></div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno">  115</span><span class="comment">   */</span></div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno">  116</span>  <span class="keyword">template</span>&lt;<span class="keyword">typename</span> Create_ev_wait_hndl_func&gt;</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno">  117</span>  <span class="keywordtype">bool</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a3ee71a39a443e78c86f82652d8d0601e">replace_event_wait_handles</a>(<span class="keyword">const</span> Create_ev_wait_hndl_func&amp; create_ev_wait_hndl_func);</div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno">  118</span><span class="comment"></span> </div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno">  119</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno">  120</span><span class="comment">   * See Blob_stream_mq_receiver counterpart, but assuming PEER state.</span></div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno">  121</span><span class="comment">   *</span></div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno">  122</span><span class="comment">   * @return See Blob_stream_mq_receiver counterpart.</span></div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno">  123</span><span class="comment">   */</span></div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno">  124</span>  <span class="keywordtype">size_t</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a8df5929fc0f3413079df8e2be08bf972">receive_blob_max_size</a>() <span class="keyword">const</span>;</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno">  125</span><span class="comment"></span> </div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno">  126</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno">  127</span><span class="comment">   * See Blob_stream_mq_receiver counterpart.</span></div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno">  128</span><span class="comment">   *</span></div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno">  129</span><span class="comment">   * @param ev_wait_func</span></div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno">  130</span><span class="comment">   *        See Blob_stream_mq_receiver counterpart.</span></div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno">  131</span><span class="comment">   * @return See Blob_stream_mq_receiver counterpart.</span></div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno">  132</span><span class="comment">   */</span></div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno">  133</span>  <span class="keywordtype">bool</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a1e286f452b6e3a74d64e1f795795afe2">start_receive_blob_ops</a>(<a class="code hl_typedef" href="namespaceipc_1_1util_1_1sync__io.html#aa0b9a3cc6bdc7dedbef4f9e06851aa24">util::sync_io::Event_wait_func</a>&amp;&amp; ev_wait_func);</div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno">  134</span><span class="comment"></span> </div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno">  135</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno">  136</span><span class="comment">   * See Blob_stream_mq_receiver counterpart, but assuming PEER state.</span></div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno">  137</span><span class="comment">   *</span></div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno">  138</span><span class="comment">   * @param target_blob</span></div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno">  139</span><span class="comment">   *        See Blob_stream_mq_receiver counterpart.</span></div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno">  140</span><span class="comment">   * @param sync_err_code</span></div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno">  141</span><span class="comment">   *        See Blob_stream_mq_receiver counterpart.</span></div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno">  142</span><span class="comment">   * @param sync_sz</span></div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno">  143</span><span class="comment">   *        See Blob_stream_mq_receiver counterpart.</span></div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno">  144</span><span class="comment">   * @param on_done_func</span></div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno">  145</span><span class="comment">   *        See Blob_stream_mq_receiver counterpart.</span></div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno">  146</span><span class="comment">   * @return See Blob_stream_mq_receiver counterpart.</span></div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno">  147</span><span class="comment">   */</span></div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno">  148</span>  <span class="keyword">template</span>&lt;<span class="keyword">typename</span> Task_err_sz&gt;</div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno">  149</span>  <span class="keywordtype">bool</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a8d1a81d379e1a31031adb9cccbbabd35">async_receive_blob</a>(<span class="keyword">const</span> <a class="code hl_typedef" href="namespaceipc_1_1util.html#a6cb62ae434900f3a8915b33ec5d61a96">util::Blob_mutable</a>&amp; target_blob,</div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno">  150</span>                          <a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a>* sync_err_code, <span class="keywordtype">size_t</span>* sync_sz,</div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno">  151</span>                          Task_err_sz&amp;&amp; on_done_func);</div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno">  152</span><span class="comment"></span> </div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno">  153</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno">  154</span><span class="comment">   * See Blob_stream_mq_receiver counterpart, but assuming PEER state.</span></div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno">  155</span><span class="comment">   *</span></div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno">  156</span><span class="comment">   * @param timeout</span></div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno">  157</span><span class="comment">   *        See Blob_stream_mq_receiver counterpart.</span></div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno">  158</span><span class="comment">   * @return See Blob_stream_mq_receiver counterpart.</span></div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno">  159</span><span class="comment">   */</span></div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno">  160</span>  <span class="keywordtype">bool</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a878fa03873bcdea5aa9d938a4791325f">idle_timer_run</a>(<a class="code hl_typedef" href="namespaceipc_1_1util.html#ac66141280c3b7295a86b65209f31cc58">util::Fine_duration</a> timeout);</div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno">  161</span><span class="comment"></span> </div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno">  162</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno">  163</span><span class="comment">   * See Blob_stream_mq_receiver counterpart, but assuming PEER state.</span></div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno">  164</span><span class="comment">   * @return See Blob_stream_mq_receiver counterpart.</span></div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno">  165</span><span class="comment">   */</span></div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno">  166</span>  <span class="keyword">const</span> std::string&amp; <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#adaf3579ec3abf0b5d85258965d264660">nickname</a>() <span class="keyword">const</span>;</div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno">  167</span><span class="comment"></span> </div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno">  168</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno">  169</span><span class="comment">   * See Blob_stream_mq_receiver counterpart, but assuming PEER state.</span></div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno">  170</span><span class="comment">   *</span></div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno">  171</span><span class="comment">   * @return See Blob_stream_mq_receiver counterpart.</span></div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno">  172</span><span class="comment">   */</span></div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno">  173</span>  <span class="keyword">const</span> <a class="code hl_class" href="classipc_1_1util_1_1Shared__name.html">Shared_name</a>&amp; <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#acf5dd76c0d00746137fe6adedfa4c26d">absolute_name</a>() <span class="keyword">const</span>;</div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno">  174</span> </div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno">  175</span><span class="keyword">private</span>:</div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno">  176</span>  <span class="comment">// Types.</span></div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno">  177</span><span class="comment"></span> </div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno">  178</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno">  179</span><span class="comment">   * Identical to sync_io::Async_adapter_receiver::User_request, except we only keep at most 1 of these</span></div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno">  180</span><span class="comment">   * and thus don&#39;t need a `Ptr` alias inside; and we need not worry about transmitting `Native_handle`s.</span></div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno">  181</span><span class="comment">   * As in that other class, this records the args from an async_receive_blob() call.</span></div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno">  182</span><span class="comment">   */</span></div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno"><a class="line" href="structipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_1_1User__request.html">  183</a></span>  <span class="keyword">struct </span><a class="code hl_struct" href="structipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_1_1User__request.html">User_request</a></div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno">  184</span>  {</div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno">  185</span>    <span class="comment">// Data.</span></div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno">  186</span><span class="comment"></span> </div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno">  187</span><span class="comment">    /// Same as in sync_io::Async_adapter_receiver::User_request.</span></div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno"><a class="line" href="structipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_1_1User__request.html#aabc02495e840cdd6fe0e5bfa31b33509">  188</a></span><span class="comment"></span>    <a class="code hl_typedef" href="namespaceipc_1_1util.html#a6cb62ae434900f3a8915b33ec5d61a96">util::Blob_mutable</a> <a class="code hl_variable" href="structipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_1_1User__request.html#aabc02495e840cdd6fe0e5bfa31b33509">m_target_blob</a>;<span class="comment"></span></div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno">  189</span><span class="comment">    /// Same as in sync_io::Async_adapter_receiver::User_request.</span></div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno"><a class="line" href="structipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_1_1User__request.html#a8da903f9c107dd546991e8b9843190e6">  190</a></span><span class="comment"></span>    flow::async::Task_asio_err_sz <a class="code hl_variable" href="structipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_1_1User__request.html#a8da903f9c107dd546991e8b9843190e6">m_on_done_func</a>;</div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno">  191</span>  }; <span class="comment">// struct User_request</span></div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno">  192</span><span class="comment"></span> </div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno">  193</span><span class="comment">  /// Short-hand for Blob_stream_mq_base_impl::Control_cmd.</span></div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#add17b83b9c20b617a13dcdc22e9b8d8d">  194</a></span><span class="comment"></span>  <span class="keyword">using </span><a class="code hl_enumeration" href="classipc_1_1transport_1_1Blob__stream__mq__base__impl.html#a2e46672d40fbf38cf6054edfad69e705">Control_cmd</a> = <span class="keyword">typename</span> <a class="code hl_enumeration" href="classipc_1_1transport_1_1Blob__stream__mq__base__impl.html#a2e46672d40fbf38cf6054edfad69e705">Base::Control_cmd</a>;</div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno">  195</span> </div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno">  196</span>  <span class="comment">// Methods.</span></div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno">  197</span><span class="comment"></span> </div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno">  198</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno">  199</span><span class="comment">   * Handler for the async-wait, via util::sync_io::Timer_event_emitter, of the idle timer firing;</span></div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno">  200</span><span class="comment">   * if still relevant it records the idle-timeout error in #m_pending_err_code; and if</span></div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno">  201</span><span class="comment">   * an async_receive_blob() is in progress (awaiting data via async-wait), it completes</span></div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno">  202</span><span class="comment">   * that operation with the appropriate idle-timeout error (completion handler in #m_user_request runs</span></div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno">  203</span><span class="comment">   * synchronously).  If not still relevant -- #m_pending_err_code already is truthy -- then no-ops.</span></div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno">  204</span><span class="comment">   */</span></div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno">  205</span>  <span class="keywordtype">void</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a5c46890c19e4fe69d9276647205af786">on_ev_idle_timer_fired</a>();</div>
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno">  206</span><span class="comment"></span> </div>
<div class="line"><a id="l00207" name="l00207"></a><span class="lineno">  207</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno">  208</span><span class="comment">   * No-ops if idle_timer_run() is not engaged; otherwise reacts to non-idleness of the in-pipe by</span></div>
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno">  209</span><span class="comment">   * rescheduling idle timer to occur in #m_idle_timeout again.</span></div>
<div class="line"><a id="l00210" name="l00210"></a><span class="lineno">  210</span><span class="comment">   * (Other code calls this, as of this writing, on receipt of a complete message.)</span></div>
<div class="line"><a id="l00211" name="l00211"></a><span class="lineno">  211</span><span class="comment">   *</span></div>
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno">  212</span><span class="comment">   * Note that this can only occur while an async_receive_blob() is in progress; as otherwise</span></div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno">  213</span><span class="comment">   * we will not be reading the low-level pipe at all.  This is a requirement for using</span></div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno">  214</span><span class="comment">   * idle_timer_run(), so it&#39;s not our fault, if they don&#39;t do it and get timed-out.</span></div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno">  215</span><span class="comment">   */</span></div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno">  216</span>  <span class="keywordtype">void</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ad98d5cf3970b4cef4932d59679c7d5b9">not_idle</a>();</div>
<div class="line"><a id="l00217" name="l00217"></a><span class="lineno">  217</span><span class="comment"></span> </div>
<div class="line"><a id="l00218" name="l00218"></a><span class="lineno">  218</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00219" name="l00219"></a><span class="lineno">  219</span><span class="comment">   * Begins read chain (completing it as synchronously as possible, async-completing the rest) for the next</span></div>
<div class="line"><a id="l00220" name="l00220"></a><span class="lineno">  220</span><span class="comment">   * in-message.</span></div>
<div class="line"><a id="l00221" name="l00221"></a><span class="lineno">  221</span><span class="comment">   *</span></div>
<div class="line"><a id="l00222" name="l00222"></a><span class="lineno">  222</span><span class="comment">   * Given the pre-condition that (1) async_receive_blob() is oustanding (#m_user_request not null),</span></div>
<div class="line"><a id="l00223" name="l00223"></a><span class="lineno">  223</span><span class="comment">   * (2) in the pipe we expect payload 1 (of 1 or 2) of the next in-message next, (3) there is no known pipe error</span></div>
<div class="line"><a id="l00224" name="l00224"></a><span class="lineno">  224</span><span class="comment">   * already detected, and (4) there is no known would-block condition on the in-pipe: this reads (asynchronously</span></div>
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno">  225</span><span class="comment">   * if would-block is encountered at some point in there) the next message.</span></div>
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno">  226</span><span class="comment">   *</span></div>
<div class="line"><a id="l00227" name="l00227"></a><span class="lineno">  227</span><span class="comment">   * @param sync_err_code</span></div>
<div class="line"><a id="l00228" name="l00228"></a><span class="lineno">  228</span><span class="comment">   *        Outcome out-arg: error::Code::S_SYNC_IO_WOULD_BLOCK if async-wait triggered, as message could not be</span></div>
<div class="line"><a id="l00229" name="l00229"></a><span class="lineno">  229</span><span class="comment">   *        fully read synchronously; falsy if message fully read synchronously; non-would-block truthy value,</span></div>
<div class="line"><a id="l00230" name="l00230"></a><span class="lineno">  230</span><span class="comment">   *        if pipe-hosing condition encountered.</span></div>
<div class="line"><a id="l00231" name="l00231"></a><span class="lineno">  231</span><span class="comment">   * @param sync_sz</span></div>
<div class="line"><a id="l00232" name="l00232"></a><span class="lineno">  232</span><span class="comment">   *        Outcome out-arg: If `*sync_err_code` truthy then zero; else size of completed in-message.</span></div>
<div class="line"><a id="l00233" name="l00233"></a><span class="lineno">  233</span><span class="comment">   */</span></div>
<div class="line"><a id="l00234" name="l00234"></a><span class="lineno">  234</span>  <span class="keywordtype">void</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a6c1e656d4ce90d13b4f2f38fa5ad5cf9">read_msg</a>(<a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a>* sync_err_code, <span class="keywordtype">size_t</span>* sync_sz);</div>
<div class="line"><a id="l00235" name="l00235"></a><span class="lineno">  235</span><span class="comment"></span> </div>
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno">  236</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00237" name="l00237"></a><span class="lineno">  237</span><span class="comment">   * Helper that returns `true` silently if `start_*_ops()` has been called; else</span></div>
<div class="line"><a id="l00238" name="l00238"></a><span class="lineno">  238</span><span class="comment">   * logs WARNING and returns `false`.</span></div>
<div class="line"><a id="l00239" name="l00239"></a><span class="lineno">  239</span><span class="comment">   *</span></div>
<div class="line"><a id="l00240" name="l00240"></a><span class="lineno">  240</span><span class="comment">   * @param context</span></div>
<div class="line"><a id="l00241" name="l00241"></a><span class="lineno">  241</span><span class="comment">   *        For logging: the algorithmic context (function name or whatever).</span></div>
<div class="line"><a id="l00242" name="l00242"></a><span class="lineno">  242</span><span class="comment">   * @return See above.</span></div>
<div class="line"><a id="l00243" name="l00243"></a><span class="lineno">  243</span><span class="comment">   */</span></div>
<div class="line"><a id="l00244" name="l00244"></a><span class="lineno">  244</span>  <span class="keywordtype">bool</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a013d5b8cd991e0ba9d2e26a0f532fed8">op_started</a>(<a class="code hl_typedef" href="namespaceipc_1_1util.html#ae6ac47812a90d1287c61e0b7de7bc4f5">util::String_view</a> context) <span class="keyword">const</span>;</div>
<div class="line"><a id="l00245" name="l00245"></a><span class="lineno">  245</span> </div>
<div class="line"><a id="l00246" name="l00246"></a><span class="lineno">  246</span>  <span class="comment">// Data.</span></div>
<div class="line"><a id="l00247" name="l00247"></a><span class="lineno">  247</span><span class="comment"></span> </div>
<div class="line"><a id="l00248" name="l00248"></a><span class="lineno">  248</span><span class="comment">  /// See nickname().</span></div>
<div class="line"><a id="l00249" name="l00249"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ac892341e6a1fcc6ef8739bce8403fb6d">  249</a></span><span class="comment"></span>  <span class="keyword">const</span> std::string <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ac892341e6a1fcc6ef8739bce8403fb6d">m_nickname</a>;</div>
<div class="line"><a id="l00250" name="l00250"></a><span class="lineno">  250</span><span class="comment"></span> </div>
<div class="line"><a id="l00251" name="l00251"></a><span class="lineno">  251</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00252" name="l00252"></a><span class="lineno">  252</span><span class="comment">   * Handles the protocol negotiation at the start of the pipe and subsequently stores the result of that negotiation.</span></div>
<div class="line"><a id="l00253" name="l00253"></a><span class="lineno">  253</span><span class="comment">   *</span></div>
<div class="line"><a id="l00254" name="l00254"></a><span class="lineno">  254</span><span class="comment">   * @see Protocol_negotiator doc header for key background on the topic.</span></div>
<div class="line"><a id="l00255" name="l00255"></a><span class="lineno">  255</span><span class="comment">   * @see Blob_stream_mq_sender_impl::m_protocol_negotiator doc header which contains notes relevant to possible future</span></div>
<div class="line"><a id="l00256" name="l00256"></a><span class="lineno">  256</span><span class="comment">   *      development of the present class regarding speaking multiple protocol versions.</span></div>
<div class="line"><a id="l00257" name="l00257"></a><span class="lineno">  257</span><span class="comment">   */</span></div>
<div class="line"><a id="l00258" name="l00258"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#aeec08979b985498aa0738892c947a8a9">  258</a></span>  <a class="code hl_class" href="classipc_1_1transport_1_1Protocol__negotiator.html">Protocol_negotiator</a> <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#aeec08979b985498aa0738892c947a8a9">m_protocol_negotiator</a>;</div>
<div class="line"><a id="l00259" name="l00259"></a><span class="lineno">  259</span><span class="comment"></span> </div>
<div class="line"><a id="l00260" name="l00260"></a><span class="lineno">  260</span><span class="comment">  /// See absolute_name().</span></div>
<div class="line"><a id="l00261" name="l00261"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#add6affc3ee78f02c3a48a10115ec82ea">  261</a></span><span class="comment"></span>  <span class="keyword">const</span> <a class="code hl_class" href="classipc_1_1util_1_1Shared__name.html">Shared_name</a> <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#add6affc3ee78f02c3a48a10115ec82ea">m_absolute_name</a>;</div>
<div class="line"><a id="l00262" name="l00262"></a><span class="lineno">  262</span><span class="comment"></span> </div>
<div class="line"><a id="l00263" name="l00263"></a><span class="lineno">  263</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00264" name="l00264"></a><span class="lineno">  264</span><span class="comment">   * The `Task_engine` for `m_mq_ready_*`.  It is necessary to construct those pipe-end objects, but we never</span></div>
<div class="line"><a id="l00265" name="l00265"></a><span class="lineno">  265</span><span class="comment">   * use that guy&#39;s `-&gt;async_*()` APIs -- only non-blocking operations, essentially leveraging boost.asio&#39;s</span></div>
<div class="line"><a id="l00266" name="l00266"></a><span class="lineno">  266</span><span class="comment">   * portable transmission APIs but not its actual, um, async-I/O abilities in this case.  Accordingly we</span></div>
<div class="line"><a id="l00267" name="l00267"></a><span class="lineno">  267</span><span class="comment">   * never load any tasks onto #m_nb_task_engine and certainly never `.run()` (or `.poll()` or ...) it.</span></div>
<div class="line"><a id="l00268" name="l00268"></a><span class="lineno">  268</span><span class="comment">   *</span></div>
<div class="line"><a id="l00269" name="l00269"></a><span class="lineno">  269</span><span class="comment">   * In the `sync_io` pattern the user&#39;s outside event loop is responsible for awaiting readability/writability</span></div>
<div class="line"><a id="l00270" name="l00270"></a><span class="lineno">  270</span><span class="comment">   * of a guy like #m_mq_ready_reader via our exporting of its `.native_handle()`.</span></div>
<div class="line"><a id="l00271" name="l00271"></a><span class="lineno">  271</span><span class="comment">   *</span></div>
<div class="line"><a id="l00272" name="l00272"></a><span class="lineno">  272</span><span class="comment">   * Never touched if Persistent_mq_handle::S_HAS_NATIVE_HANDLE.</span></div>
<div class="line"><a id="l00273" name="l00273"></a><span class="lineno">  273</span><span class="comment">   *</span></div>
<div class="line"><a id="l00274" name="l00274"></a><span class="lineno">  274</span><span class="comment">   * @todo Consider using specialization instead of or in addition `if constexpr()` w/r/t</span></div>
<div class="line"><a id="l00275" name="l00275"></a><span class="lineno">  275</span><span class="comment">   * `Mq::S_HAS_NATIVE_HANDLE`-based compile-time branching: it could save some RAM by eliminating `optional`s</span></div>
<div class="line"><a id="l00276" name="l00276"></a><span class="lineno">  276</span><span class="comment">   * such as the one near this to-do; though code would likely become wordier.</span></div>
<div class="line"><a id="l00277" name="l00277"></a><span class="lineno">  277</span><span class="comment">   */</span></div>
<div class="line"><a id="l00278" name="l00278"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a9f1120b92ea20944b2de416d870644ce">  278</a></span>  std::optional&lt;flow::util::Task_engine&gt; <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a9f1120b92ea20944b2de416d870644ce">m_nb_task_engine</a>;</div>
<div class="line"><a id="l00279" name="l00279"></a><span class="lineno">  279</span><span class="comment"></span> </div>
<div class="line"><a id="l00280" name="l00280"></a><span class="lineno">  280</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00281" name="l00281"></a><span class="lineno">  281</span><span class="comment">   * The `Task_engine` for `m_ev_wait_hndl_*`, unless it is replaced via replace_event_wait_handles().</span></div>
<div class="line"><a id="l00282" name="l00282"></a><span class="lineno">  282</span><span class="comment">   * There are 2 possibilities:</span></div>
<div class="line"><a id="l00283" name="l00283"></a><span class="lineno">  283</span><span class="comment">   *   - They leave this guy associated with `m_ev_wait_hndl_*`.  Then no one shall be doing `.async_wait()` on</span></div>
<div class="line"><a id="l00284" name="l00284"></a><span class="lineno">  284</span><span class="comment">   *     them, and instead the user aims to perhaps use raw `[e]poll*()` on their `.native_handle()`s.</span></div>
<div class="line"><a id="l00285" name="l00285"></a><span class="lineno">  285</span><span class="comment">   *     We still need some `Task_engine` to construct them though, so we use this.</span></div>
<div class="line"><a id="l00286" name="l00286"></a><span class="lineno">  286</span><span class="comment">   *   - They use replace_event_wait_handles(), and therefore this becomes dissociated with `m_ev_wait_hndl_*` and</span></div>
<div class="line"><a id="l00287" name="l00287"></a><span class="lineno">  287</span><span class="comment">   *     becomes completely unused in any fashion, period.  Then they shall probably be doing</span></div>
<div class="line"><a id="l00288" name="l00288"></a><span class="lineno">  288</span><span class="comment">   *     their own `.async_wait()` -- associated with their own `Task_engine` -- on `m_ev_wait_hndl_*`.</span></div>
<div class="line"><a id="l00289" name="l00289"></a><span class="lineno">  289</span><span class="comment">   *</span></div>
<div class="line"><a id="l00290" name="l00290"></a><span class="lineno">  290</span><span class="comment">   * This is all to fulfill the `sync_io` pattern.</span></div>
<div class="line"><a id="l00291" name="l00291"></a><span class="lineno">  291</span><span class="comment">   */</span></div>
<div class="line"><a id="l00292" name="l00292"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#aa3b1062b158606ea1760a3952b978e73">  292</a></span>  flow::util::Task_engine <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#aa3b1062b158606ea1760a3952b978e73">m_ev_hndl_task_engine_unused</a>;</div>
<div class="line"><a id="l00293" name="l00293"></a><span class="lineno">  293</span><span class="comment"></span> </div>
<div class="line"><a id="l00294" name="l00294"></a><span class="lineno">  294</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00295" name="l00295"></a><span class="lineno">  295</span><span class="comment">   * The MQ handle adopted by the ctor, through which nb-receives and blocking-waits are executed.</span></div>
<div class="line"><a id="l00296" name="l00296"></a><span class="lineno">  296</span><span class="comment">   * It is not directly protected by any mutex; however it is accessed exclusively as follows:</span></div>
<div class="line"><a id="l00297" name="l00297"></a><span class="lineno">  297</span><span class="comment">   *   - By thread W, when #m_user_request is non-null (would-block state), thus thread U has tasked</span></div>
<div class="line"><a id="l00298" name="l00298"></a><span class="lineno">  298</span><span class="comment">   *     it with awaiting readability -- which it is doing and is not yet done doing.</span></div>
<div class="line"><a id="l00299" name="l00299"></a><span class="lineno">  299</span><span class="comment">   *   - By thread U, when #m_user_request is null (no would-block at the moment); or</span></div>
<div class="line"><a id="l00300" name="l00300"></a><span class="lineno">  300</span><span class="comment">   *     it is not null, but thread W has signaled it is done awaiting non-would-block, so thread U</span></div>
<div class="line"><a id="l00301" name="l00301"></a><span class="lineno">  301</span><span class="comment">   *     is trying to nullify it via nb-reads.</span></div>
<div class="line"><a id="l00302" name="l00302"></a><span class="lineno">  302</span><span class="comment">   *</span></div>
<div class="line"><a id="l00303" name="l00303"></a><span class="lineno">  303</span><span class="comment">   * Exception: `m_mq-&gt;interrupt_receives()` is done from thread U (dtor), potentially *while* thread W</span></div>
<div class="line"><a id="l00304" name="l00304"></a><span class="lineno">  304</span><span class="comment">   * is inside `m_mq-&gt;wait_receivable()`.  However that specific action is allowed by Persistent_mq_handle contract</span></div>
<div class="line"><a id="l00305" name="l00305"></a><span class="lineno">  305</span><span class="comment">   * (in fact that is the main utility of Persistent_mq_handle::interrupt_receives()).  It makes the</span></div>
<div class="line"><a id="l00306" name="l00306"></a><span class="lineno">  306</span><span class="comment">   * Persistent_mq_handle::wait_receivable() immediately return.</span></div>
<div class="line"><a id="l00307" name="l00307"></a><span class="lineno">  307</span><span class="comment">   *</span></div>
<div class="line"><a id="l00308" name="l00308"></a><span class="lineno">  308</span><span class="comment">   * If and only if #m_pending_err_code is truthy, #m_mq is null; hence the handle&#39;s system resources (and the</span></div>
<div class="line"><a id="l00309" name="l00309"></a><span class="lineno">  309</span><span class="comment">   * handle object&#39;s memory itself) are given back at the earliest possible time.</span></div>
<div class="line"><a id="l00310" name="l00310"></a><span class="lineno">  310</span><span class="comment">   */</span></div>
<div class="line"><a id="l00311" name="l00311"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ae71fa0a5594915910b0b8dd88743f62e">  311</a></span>  <span class="keyword">typename</span> <a class="code hl_typedef" href="classipc_1_1transport_1_1Blob__stream__mq__base__impl.html#aab7c4c91d42c746c93e61eb367572eb1">Base::Auto_closing_mq</a> <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ae71fa0a5594915910b0b8dd88743f62e">m_mq</a>;</div>
<div class="line"><a id="l00312" name="l00312"></a><span class="lineno">  312</span><span class="comment"></span> </div>
<div class="line"><a id="l00313" name="l00313"></a><span class="lineno">  313</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00314" name="l00314"></a><span class="lineno">  314</span><span class="comment">   * Equals `m_mq.max_msg_size()`.</span></div>
<div class="line"><a id="l00315" name="l00315"></a><span class="lineno">  315</span><span class="comment">   * ### Rationale ###</span></div>
<div class="line"><a id="l00316" name="l00316"></a><span class="lineno">  316</span><span class="comment">   * It is saved in ctor, instead of invoking `m_mq-&gt;max_msg_size()` when needed, to keep the rules for when #m_mq</span></div>
<div class="line"><a id="l00317" name="l00317"></a><span class="lineno">  317</span><span class="comment">   * is accessed simple and as described in its doc header.  After all this value would never change anyway.</span></div>
<div class="line"><a id="l00318" name="l00318"></a><span class="lineno">  318</span><span class="comment">   */</span></div>
<div class="line"><a id="l00319" name="l00319"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a25ec1b85b46e3b9ad9a4fe59bc158f45">  319</a></span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a25ec1b85b46e3b9ad9a4fe59bc158f45">m_mq_max_msg_sz</a>;</div>
<div class="line"><a id="l00320" name="l00320"></a><span class="lineno">  320</span><span class="comment"></span> </div>
<div class="line"><a id="l00321" name="l00321"></a><span class="lineno">  321</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00322" name="l00322"></a><span class="lineno">  322</span><span class="comment">   * Read-end of IPC-pipe used by thread U to detect that a thread-W transmissibility-wait has completed,</span></div>
<div class="line"><a id="l00323" name="l00323"></a><span class="lineno">  323</span><span class="comment">   * meaning would-block has cleared, and therefore thread U can attempt to nb-transmit again.  The signal byte</span></div>
<div class="line"><a id="l00324" name="l00324"></a><span class="lineno">  324</span><span class="comment">   * is read out of #m_mq_ready_reader, making it empty again (the steady-state before the next time would-block</span></div>
<div class="line"><a id="l00325" name="l00325"></a><span class="lineno">  325</span><span class="comment">   * occurs, and a byte is written to it making it non-empty).</span></div>
<div class="line"><a id="l00326" name="l00326"></a><span class="lineno">  326</span><span class="comment">   *</span></div>
<div class="line"><a id="l00327" name="l00327"></a><span class="lineno">  327</span><span class="comment">   * @see #m_mq_ready_writer.</span></div>
<div class="line"><a id="l00328" name="l00328"></a><span class="lineno">  328</span><span class="comment">   *</span></div>
<div class="line"><a id="l00329" name="l00329"></a><span class="lineno">  329</span><span class="comment">   * Never touched if Persistent_mq_handle::S_HAS_NATIVE_HANDLE.</span></div>
<div class="line"><a id="l00330" name="l00330"></a><span class="lineno">  330</span><span class="comment">   */</span></div>
<div class="line"><a id="l00331" name="l00331"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#af742578435fde1d0c536196698ddbc75">  331</a></span>  std::optional&lt;util::Pipe_reader&gt; <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#af742578435fde1d0c536196698ddbc75">m_mq_ready_reader</a>;</div>
<div class="line"><a id="l00332" name="l00332"></a><span class="lineno">  332</span><span class="comment"></span> </div>
<div class="line"><a id="l00333" name="l00333"></a><span class="lineno">  333</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00334" name="l00334"></a><span class="lineno">  334</span><span class="comment">   * Write-end of IPC-pipe used by thread W to inform thread U that a thread-W transmissibility-wait has completed,</span></div>
<div class="line"><a id="l00335" name="l00335"></a><span class="lineno">  335</span><span class="comment">   * meaning would-block has cleared, and therefore thread U can attempt to nb-transmit again.  A signal byte</span></div>
<div class="line"><a id="l00336" name="l00336"></a><span class="lineno">  336</span><span class="comment">   * is written to #m_mq_ready_writer, making it non-empty.</span></div>
<div class="line"><a id="l00337" name="l00337"></a><span class="lineno">  337</span><span class="comment">   *</span></div>
<div class="line"><a id="l00338" name="l00338"></a><span class="lineno">  338</span><span class="comment">   * @see #m_mq_ready_reader.</span></div>
<div class="line"><a id="l00339" name="l00339"></a><span class="lineno">  339</span><span class="comment">   *</span></div>
<div class="line"><a id="l00340" name="l00340"></a><span class="lineno">  340</span><span class="comment">   * Never touched if Persistent_mq_handle::S_HAS_NATIVE_HANDLE.</span></div>
<div class="line"><a id="l00341" name="l00341"></a><span class="lineno">  341</span><span class="comment">   */</span></div>
<div class="line"><a id="l00342" name="l00342"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ac181b33a0b5cdb0e89753b62d86af50f">  342</a></span>  std::optional&lt;util::Pipe_writer&gt; <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ac181b33a0b5cdb0e89753b62d86af50f">m_mq_ready_writer</a>;</div>
<div class="line"><a id="l00343" name="l00343"></a><span class="lineno">  343</span><span class="comment"></span> </div>
<div class="line"><a id="l00344" name="l00344"></a><span class="lineno">  344</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00345" name="l00345"></a><span class="lineno">  345</span><span class="comment">   * Descriptor waitable by outside event loop async-waits -- storing the same `Native_handle` as (and thus being</span></div>
<div class="line"><a id="l00346" name="l00346"></a><span class="lineno">  346</span><span class="comment">   * used to wait on events from) #m_mq_ready_reader; or if #m_mq can be watched directly (known at compile-time)</span></div>
<div class="line"><a id="l00347" name="l00347"></a><span class="lineno">  347</span><span class="comment">   * then as `m_mq` itself.  Its name suggests it&#39;s watching #m_mq (for transmissibility),</span></div>
<div class="line"><a id="l00348" name="l00348"></a><span class="lineno">  348</span><span class="comment">   * and that&#39;s true: In the latter case one directly watches it for transmissibility in the proper direction;</span></div>
<div class="line"><a id="l00349" name="l00349"></a><span class="lineno">  349</span><span class="comment">   * in the former case Persistent_mq_handle lacks a #Native_handle to watch directly -- but we use the</span></div>
<div class="line"><a id="l00350" name="l00350"></a><span class="lineno">  350</span><span class="comment">   * `m_mq_ready_*` pipe and a background thread to simulate it having one.  Thus in that case #m_mq_ready_reader FD =</span></div>
<div class="line"><a id="l00351" name="l00351"></a><span class="lineno">  351</span><span class="comment">   * this FD, and it being transmissible = MQ being transmissible.</span></div>
<div class="line"><a id="l00352" name="l00352"></a><span class="lineno">  352</span><span class="comment">   */</span></div>
<div class="line"><a id="l00353" name="l00353"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a87df1a6c9a98542a8fb00a9d85570c64">  353</a></span>  <a class="code hl_class" href="classipc_1_1util_1_1sync__io_1_1Asio__waitable__native__handle.html">util::sync_io::Asio_waitable_native_handle</a> <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a87df1a6c9a98542a8fb00a9d85570c64">m_ev_wait_hndl_mq</a>;</div>
<div class="line"><a id="l00354" name="l00354"></a><span class="lineno">  354</span><span class="comment"></span> </div>
<div class="line"><a id="l00355" name="l00355"></a><span class="lineno">  355</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00356" name="l00356"></a><span class="lineno">  356</span><span class="comment">   * As typical in timer-needing `sync_io`-pattern-implementing objects, maintains a thread exclusively for</span></div>
<div class="line"><a id="l00357" name="l00357"></a><span class="lineno">  357</span><span class="comment">   * `Timer` wait completion handlers which ferry timer-fired events to internal IPC-mechanisms waitable</span></div>
<div class="line"><a id="l00358" name="l00358"></a><span class="lineno">  358</span><span class="comment">   * by the `sync_io`-pattern-using outside event loop.  In our case we (optionally) maintain the idle timer.</span></div>
<div class="line"><a id="l00359" name="l00359"></a><span class="lineno">  359</span><span class="comment">   *</span></div>
<div class="line"><a id="l00360" name="l00360"></a><span class="lineno">  360</span><span class="comment">   * @see util::sync_io::Timer_event_emitter doc header for design/rationale discussion.</span></div>
<div class="line"><a id="l00361" name="l00361"></a><span class="lineno">  361</span><span class="comment">   */</span></div>
<div class="line"><a id="l00362" name="l00362"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#aae2ee292cd7b9742b32e68dfd84d8361">  362</a></span>  <a class="code hl_class" href="classipc_1_1util_1_1sync__io_1_1Timer__event__emitter.html">util::sync_io::Timer_event_emitter</a> <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#aae2ee292cd7b9742b32e68dfd84d8361">m_timer_worker</a>;</div>
<div class="line"><a id="l00363" name="l00363"></a><span class="lineno">  363</span><span class="comment"></span> </div>
<div class="line"><a id="l00364" name="l00364"></a><span class="lineno">  364</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00365" name="l00365"></a><span class="lineno">  365</span><span class="comment">   * Null if no async_receive_blob()` is currently pending; else describes the arguments to that pending</span></div>
<div class="line"><a id="l00366" name="l00366"></a><span class="lineno">  366</span><span class="comment">   * async_receive_blob().</span></div>
<div class="line"><a id="l00367" name="l00367"></a><span class="lineno">  367</span><span class="comment">   *</span></div>
<div class="line"><a id="l00368" name="l00368"></a><span class="lineno">  368</span><span class="comment">   * ### Rationale ###</span></div>
<div class="line"><a id="l00369" name="l00369"></a><span class="lineno">  369</span><span class="comment">   * It exists for a hopefully obvious reasons: At least a non-immediately-completed async_receive_blob() needs</span></div>
<div class="line"><a id="l00370" name="l00370"></a><span class="lineno">  370</span><span class="comment">   * to keep track of the request so as to know where to place results and what completion handler to invoke.</span></div>
<div class="line"><a id="l00371" name="l00371"></a><span class="lineno">  371</span><span class="comment">   *</span></div>
<div class="line"><a id="l00372" name="l00372"></a><span class="lineno">  372</span><span class="comment">   * As for it being nullable: this is used to guard against `async_receive_*()` being invoked while another</span></div>
<div class="line"><a id="l00373" name="l00373"></a><span class="lineno">  373</span><span class="comment">   * is already outstanding.  We do not queue pending requests per</span></div>
<div class="line"><a id="l00374" name="l00374"></a><span class="lineno">  374</span><span class="comment">   * sync_io::Blob_receiver concept.  (However the non-`sync_io` a/k/a async-I/O</span></div>
<div class="line"><a id="l00375" name="l00375"></a><span class="lineno">  375</span><span class="comment">   * Blob_receiver transport::Blob_stream_mq_receiver does.  Therefore</span></div>
<div class="line"><a id="l00376" name="l00376"></a><span class="lineno">  376</span><span class="comment">   * the latter class does internally implement a `User_request` queue.)</span></div>
<div class="line"><a id="l00377" name="l00377"></a><span class="lineno">  377</span><span class="comment">   */</span></div>
<div class="line"><a id="l00378" name="l00378"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a819d349f5cafcba88f3dff63968d74b0">  378</a></span>  std::optional&lt;User_request&gt; <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a819d349f5cafcba88f3dff63968d74b0">m_user_request</a>;</div>
<div class="line"><a id="l00379" name="l00379"></a><span class="lineno">  379</span><span class="comment"></span> </div>
<div class="line"><a id="l00380" name="l00380"></a><span class="lineno">  380</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00381" name="l00381"></a><span class="lineno">  381</span><span class="comment">   * At steady-state `false`, becomes `true` if a low-level &quot;escape&quot; payload (empty message) was last received</span></div>
<div class="line"><a id="l00382" name="l00382"></a><span class="lineno">  382</span><span class="comment">   * meaning the next message will be the encoding of a #Control_cmd enumeration value, receiving which shall</span></div>
<div class="line"><a id="l00383" name="l00383"></a><span class="lineno">  383</span><span class="comment">   * reset this to `false`.</span></div>
<div class="line"><a id="l00384" name="l00384"></a><span class="lineno">  384</span><span class="comment">   */</span></div>
<div class="line"><a id="l00385" name="l00385"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a276f39d3d52038a341bf2ec86b4640ef">  385</a></span>  <span class="keywordtype">bool</span> <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a276f39d3d52038a341bf2ec86b4640ef">m_control_state</a>;</div>
<div class="line"><a id="l00386" name="l00386"></a><span class="lineno">  386</span><span class="comment"></span> </div>
<div class="line"><a id="l00387" name="l00387"></a><span class="lineno">  387</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00388" name="l00388"></a><span class="lineno">  388</span><span class="comment">   * Used only when #m_control_state is `true`, this is where payload 2 (the #Control_cmd) is placed.</span></div>
<div class="line"><a id="l00389" name="l00389"></a><span class="lineno">  389</span><span class="comment">   * Though in reality it should only require `sizeof(Control_cmd)` bytes, #m_mq receive will emit an error</span></div>
<div class="line"><a id="l00390" name="l00390"></a><span class="lineno">  390</span><span class="comment">   * if it cannot hold #m_mq_max_msg_sz bytes (that is just how Persistent_mq_handle works; though we do not care</span></div>
<div class="line"><a id="l00391" name="l00391"></a><span class="lineno">  391</span><span class="comment">   * why here the reason is that&#39;s how both ipc and POSIX MQ APIs work).</span></div>
<div class="line"><a id="l00392" name="l00392"></a><span class="lineno">  392</span><span class="comment">   *</span></div>
<div class="line"><a id="l00393" name="l00393"></a><span class="lineno">  393</span><span class="comment">   * We could also abuse #m_user_request `m_target_blob`; but that seems uncool.</span></div>
<div class="line"><a id="l00394" name="l00394"></a><span class="lineno">  394</span><span class="comment">   *</span></div>
<div class="line"><a id="l00395" name="l00395"></a><span class="lineno">  395</span><span class="comment">   * @todo Maybe we should indeed use `m_user_request-&gt;m_target_blob` (instead of locally stored</span></div>
<div class="line"><a id="l00396" name="l00396"></a><span class="lineno">  396</span><span class="comment">   *       #m_target_control_blob) to save RAM/a few cycles?  Technically at least user should not care if some garbage</span></div>
<div class="line"><a id="l00397" name="l00397"></a><span class="lineno">  397</span><span class="comment">   *       is temporarily placed there (after PING a real message should arrive and replace it; or else on error</span></div>
<div class="line"><a id="l00398" name="l00398"></a><span class="lineno">  398</span><span class="comment">   *       or graceful-close who cares?).</span></div>
<div class="line"><a id="l00399" name="l00399"></a><span class="lineno">  399</span><span class="comment">   */</span></div>
<div class="line"><a id="l00400" name="l00400"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#af308d3f1ff50138070c8422552f069a5">  400</a></span>  flow::util::Blob <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#af308d3f1ff50138070c8422552f069a5">m_target_control_blob</a>;</div>
<div class="line"><a id="l00401" name="l00401"></a><span class="lineno">  401</span><span class="comment"></span> </div>
<div class="line"><a id="l00402" name="l00402"></a><span class="lineno">  402</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00403" name="l00403"></a><span class="lineno">  403</span><span class="comment">   * The first and only MQ-hosing error condition detected when attempting to low-level-read on</span></div>
<div class="line"><a id="l00404" name="l00404"></a><span class="lineno">  404</span><span class="comment">   * #m_mq; or falsy if no such error has yet been detected.  Among possible other uses, it is emitted</span></div>
<div class="line"><a id="l00405" name="l00405"></a><span class="lineno">  405</span><span class="comment">   * to the ongoing-at-the-time async_receive_blob()&#39;s completion handler (if one is indeed outstanding)</span></div>
<div class="line"><a id="l00406" name="l00406"></a><span class="lineno">  406</span><span class="comment">   * and immediately to any subsequent async_receive_blob().</span></div>
<div class="line"><a id="l00407" name="l00407"></a><span class="lineno">  407</span><span class="comment">   */</span></div>
<div class="line"><a id="l00408" name="l00408"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a415d72c8ed4bed42fc84bf46f716742a">  408</a></span>  <a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a> <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a415d72c8ed4bed42fc84bf46f716742a">m_pending_err_code</a>;</div>
<div class="line"><a id="l00409" name="l00409"></a><span class="lineno">  409</span><span class="comment"></span> </div>
<div class="line"><a id="l00410" name="l00410"></a><span class="lineno">  410</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00411" name="l00411"></a><span class="lineno">  411</span><span class="comment">   * `timeout` from idle_timer_run() args; or `zero()` if not yet called.  #m_idle_timer stays inactive</span></div>
<div class="line"><a id="l00412" name="l00412"></a><span class="lineno">  412</span><span class="comment">   * until this becomes not-`zero()`.</span></div>
<div class="line"><a id="l00413" name="l00413"></a><span class="lineno">  413</span><span class="comment">   */</span></div>
<div class="line"><a id="l00414" name="l00414"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a370d5984484667dae6fd227e7ef0d4ff">  414</a></span>  <a class="code hl_typedef" href="namespaceipc_1_1util.html#ac66141280c3b7295a86b65209f31cc58">util::Fine_duration</a> <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a370d5984484667dae6fd227e7ef0d4ff">m_idle_timeout</a>;</div>
<div class="line"><a id="l00415" name="l00415"></a><span class="lineno">  415</span><span class="comment"></span> </div>
<div class="line"><a id="l00416" name="l00416"></a><span class="lineno">  416</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00417" name="l00417"></a><span class="lineno">  417</span><span class="comment">   * Timer that fires on_ev_idle_timer_fired() (which hoses the pipe with idle timeour error) and is</span></div>
<div class="line"><a id="l00418" name="l00418"></a><span class="lineno">  418</span><span class="comment">   * (re)scheduled to fire in #m_idle_timeout each time `*this` receives a complete message</span></div>
<div class="line"><a id="l00419" name="l00419"></a><span class="lineno">  419</span><span class="comment">   * on #m_mq.  If it does fire, without being preempted by some error to have occurred since then,</span></div>
<div class="line"><a id="l00420" name="l00420"></a><span class="lineno">  420</span><span class="comment">   * the pipe is hosed with a particular error indicating idle-timeout (so that `Error_code` is saved</span></div>
<div class="line"><a id="l00421" name="l00421"></a><span class="lineno">  421</span><span class="comment">   * to #m_pending_err_code).</span></div>
<div class="line"><a id="l00422" name="l00422"></a><span class="lineno">  422</span><span class="comment">   *</span></div>
<div class="line"><a id="l00423" name="l00423"></a><span class="lineno">  423</span><span class="comment">   * Since we implement `sync_io` pattern, the timer is obtained from, and used via, util::sync_io::Timer_event_emitter</span></div>
<div class="line"><a id="l00424" name="l00424"></a><span class="lineno">  424</span><span class="comment">   * #m_timer_worker.  See that member&#39;s doc header for more info.</span></div>
<div class="line"><a id="l00425" name="l00425"></a><span class="lineno">  425</span><span class="comment">   */</span></div>
<div class="line"><a id="l00426" name="l00426"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a7f3ac613026a5c7704641ba5b3971fe5">  426</a></span>  flow::util::Timer <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a7f3ac613026a5c7704641ba5b3971fe5">m_idle_timer</a>;</div>
<div class="line"><a id="l00427" name="l00427"></a><span class="lineno">  427</span><span class="comment"></span> </div>
<div class="line"><a id="l00428" name="l00428"></a><span class="lineno">  428</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00429" name="l00429"></a><span class="lineno">  429</span><span class="comment">   * Read-end of IPC-mechanism used by #m_timer_worker to ferry timer-fired events from #m_idle_timer</span></div>
<div class="line"><a id="l00430" name="l00430"></a><span class="lineno">  430</span><span class="comment">   * to `sync_io` outside async-wait to our actual on-timer-fired handler logic.</span></div>
<div class="line"><a id="l00431" name="l00431"></a><span class="lineno">  431</span><span class="comment">   *</span></div>
<div class="line"><a id="l00432" name="l00432"></a><span class="lineno">  432</span><span class="comment">   * @see #m_timer_worker for more info.</span></div>
<div class="line"><a id="l00433" name="l00433"></a><span class="lineno">  433</span><span class="comment">   */</span></div>
<div class="line"><a id="l00434" name="l00434"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a64d71115e8212c896eb7baa82f005c82">  434</a></span>  <a class="code hl_typedef" href="classipc_1_1util_1_1sync__io_1_1Timer__event__emitter.html#a1533a54927a64579fda02c61ec94b735">util::sync_io::Timer_event_emitter::Timer_fired_read_end</a>* <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a64d71115e8212c896eb7baa82f005c82">m_idle_timer_fired_peer</a>;</div>
<div class="line"><a id="l00435" name="l00435"></a><span class="lineno">  435</span><span class="comment"></span> </div>
<div class="line"><a id="l00436" name="l00436"></a><span class="lineno">  436</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00437" name="l00437"></a><span class="lineno">  437</span><span class="comment">   * Descriptor waitable by outside event loop async-waits -- storing the same `Native_handle` as (and thus being</span></div>
<div class="line"><a id="l00438" name="l00438"></a><span class="lineno">  438</span><span class="comment">   * used to wait on events from) #m_idle_timer_fired_peer.</span></div>
<div class="line"><a id="l00439" name="l00439"></a><span class="lineno">  439</span><span class="comment">   *</span></div>
<div class="line"><a id="l00440" name="l00440"></a><span class="lineno">  440</span><span class="comment">   * @see #m_timer_worker for more info.</span></div>
<div class="line"><a id="l00441" name="l00441"></a><span class="lineno">  441</span><span class="comment">   */</span></div>
<div class="line"><a id="l00442" name="l00442"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a0511a6453387e65378f0e66d80886bcd">  442</a></span>  <a class="code hl_class" href="classipc_1_1util_1_1sync__io_1_1Asio__waitable__native__handle.html">util::sync_io::Asio_waitable_native_handle</a> <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a0511a6453387e65378f0e66d80886bcd">m_ev_wait_hndl_idle_timer_fired_peer</a>;</div>
<div class="line"><a id="l00443" name="l00443"></a><span class="lineno">  443</span><span class="comment"></span> </div>
<div class="line"><a id="l00444" name="l00444"></a><span class="lineno">  444</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00445" name="l00445"></a><span class="lineno">  445</span><span class="comment">   * Function (set forever in start_receive_blob_ops()) through which we invoke the outside event loop&#39;s</span></div>
<div class="line"><a id="l00446" name="l00446"></a><span class="lineno">  446</span><span class="comment">   * async-wait facility for descriptors/events relevant to our ops.  See util::sync_io::Event_wait_func</span></div>
<div class="line"><a id="l00447" name="l00447"></a><span class="lineno">  447</span><span class="comment">   * doc header for a refresher on this mechanic.</span></div>
<div class="line"><a id="l00448" name="l00448"></a><span class="lineno">  448</span><span class="comment">   */</span></div>
<div class="line"><a id="l00449" name="l00449"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a1c8ac9998df02ead0180c6bc00bc58dd">  449</a></span>  <a class="code hl_typedef" href="namespaceipc_1_1util_1_1sync__io.html#aa0b9a3cc6bdc7dedbef4f9e06851aa24">util::sync_io::Event_wait_func</a> <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a1c8ac9998df02ead0180c6bc00bc58dd">m_ev_wait_func</a>;</div>
<div class="line"><a id="l00450" name="l00450"></a><span class="lineno">  450</span><span class="comment"></span> </div>
<div class="line"><a id="l00451" name="l00451"></a><span class="lineno">  451</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00452" name="l00452"></a><span class="lineno">  452</span><span class="comment">   * Worker thread W always in one of 2 states: idle; or (when #m_mq is in would-block condition) executing an</span></div>
<div class="line"><a id="l00453" name="l00453"></a><span class="lineno">  453</span><span class="comment">   * indefinite, interrupting blocking wait for transmissibility of #m_mq.  When thread U wants to receive</span></div>
<div class="line"><a id="l00454" name="l00454"></a><span class="lineno">  454</span><span class="comment">   * a payload but gets would-block, it issues the wait on this thread W and a `sync_io`-pattern async-wait</span></div>
<div class="line"><a id="l00455" name="l00455"></a><span class="lineno">  455</span><span class="comment">   * for #m_ev_wait_hndl_mq; once that wait completes in thread W, it writes a byte to an internal IPC-pipe.</span></div>
<div class="line"><a id="l00456" name="l00456"></a><span class="lineno">  456</span><span class="comment">   * #m_ev_wait_hndl_mq becomes readable, the outside event loop lets `*this` know, which completes the async-wait.</span></div>
<div class="line"><a id="l00457" name="l00457"></a><span class="lineno">  457</span><span class="comment">   *</span></div>
<div class="line"><a id="l00458" name="l00458"></a><span class="lineno">  458</span><span class="comment">   * In dtor we stop thread W, including using Persistent_mq_handle::interrupt_receives() to abort the indefinite</span></div>
<div class="line"><a id="l00459" name="l00459"></a><span class="lineno">  459</span><span class="comment">   * wait in thread W, as it will no longer be used once `*this` is destroyed.</span></div>
<div class="line"><a id="l00460" name="l00460"></a><span class="lineno">  460</span><span class="comment">   *</span></div>
<div class="line"><a id="l00461" name="l00461"></a><span class="lineno">  461</span><span class="comment">   * Ordering: If we want to let things get auto-destroyed without explicit `m_blocking_worker-&gt;stop()` or</span></div>
<div class="line"><a id="l00462" name="l00462"></a><span class="lineno">  462</span><span class="comment">   * nullifying wrappers in an explicit order, then this must be declared after #m_mq.  Otherwise code may still be</span></div>
<div class="line"><a id="l00463" name="l00463"></a><span class="lineno">  463</span><span class="comment">   * finishing up in thread W when #m_mq is destroyed already.  Anyway -- as long as this is destroyed or `.stop()`ed</span></div>
<div class="line"><a id="l00464" name="l00464"></a><span class="lineno">  464</span><span class="comment">   * before #m_mq is gone, you&#39;re cool.</span></div>
<div class="line"><a id="l00465" name="l00465"></a><span class="lineno">  465</span><span class="comment">   *</span></div>
<div class="line"><a id="l00466" name="l00466"></a><span class="lineno">  466</span><span class="comment">   * Never touched if Persistent_mq_handle::S_HAS_NATIVE_HANDLE.</span></div>
<div class="line"><a id="l00467" name="l00467"></a><span class="lineno">  467</span><span class="comment">   */</span></div>
<div class="line"><a id="l00468" name="l00468"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ad233c7b57cbb817fb243bec5d338ec2e">  468</a></span>  std::optional&lt;flow::async::Single_thread_task_loop&gt; <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ad233c7b57cbb817fb243bec5d338ec2e">m_blocking_worker</a>;</div>
<div class="line"><a id="l00469" name="l00469"></a><span class="lineno">  469</span>}; <span class="comment">// class Blob_stream_mq_receiver_impl</span></div>
<div class="line"><a id="l00470" name="l00470"></a><span class="lineno">  470</span> </div>
<div class="line"><a id="l00471" name="l00471"></a><span class="lineno">  471</span><span class="comment">// Free functions: in *_fwd.hpp.</span></div>
<div class="line"><a id="l00472" name="l00472"></a><span class="lineno">  472</span> </div>
<div class="line"><a id="l00473" name="l00473"></a><span class="lineno">  473</span><span class="comment">// Template implementations.</span></div>
<div class="line"><a id="l00474" name="l00474"></a><span class="lineno">  474</span> </div>
<div class="line"><a id="l00475" name="l00475"></a><span class="lineno">  475</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Persistent_mq_handle&gt;</div>
<div class="line"><a id="l00476" name="l00476"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a3e1c13dc986985621ab05de16f9e811c">  476</a></span><a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a3e1c13dc986985621ab05de16f9e811c">Blob_stream_mq_receiver_impl&lt;Persistent_mq_handle&gt;::Blob_stream_mq_receiver_impl</a></div>
<div class="line"><a id="l00477" name="l00477"></a><span class="lineno">  477</span>  (flow::log::Logger* logger_ptr, <a class="code hl_typedef" href="namespaceipc_1_1util.html#ae6ac47812a90d1287c61e0b7de7bc4f5">util::String_view</a> nickname_str, <a class="code hl_class" href="classipc_1_1transport_1_1Persistent__mq__handle.html">Mq</a>&amp;&amp; mq,</div>
<div class="line"><a id="l00478" name="l00478"></a><span class="lineno">  478</span>   <a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a>* err_code) :</div>
<div class="line"><a id="l00479" name="l00479"></a><span class="lineno">  479</span> </div>
<div class="line"><a id="l00480" name="l00480"></a><span class="lineno">  480</span>  flow::log::Log_context(logger_ptr, <a class="code hl_enumeration" href="namespaceipc.html#a4ccdeed058222c635745a4dc830e99f7">Log_component</a>::S_TRANSPORT),</div>
<div class="line"><a id="l00481" name="l00481"></a><span class="lineno">  481</span>  m_nickname(nickname_str),</div>
<div class="line"><a id="l00482" name="l00482"></a><span class="lineno">  482</span>  m_protocol_negotiator(get_logger(), nickname(),</div>
<div class="line"><a id="l00483" name="l00483"></a><span class="lineno">  483</span>                        1, 1), <span class="comment">// Initial protocol!  @todo Magic-number `const`(s), particularly if/when v2 exists.</span></div>
<div class="line"><a id="l00484" name="l00484"></a><span class="lineno">  484</span>  m_absolute_name(mq.absolute_name()),</div>
<div class="line"><a id="l00485" name="l00485"></a><span class="lineno">  485</span>  <span class="comment">// m_mq null for now but is set up below.</span></div>
<div class="line"><a id="l00486" name="l00486"></a><span class="lineno">  486</span>  m_mq_max_msg_sz(mq.max_msg_size()), <span class="comment">// Just grab this now though.</span></div>
<div class="line"><a id="l00487" name="l00487"></a><span class="lineno">  487</span>  m_ev_wait_hndl_mq(m_ev_hndl_task_engine_unused), <span class="comment">// This needs to be .assign()ed still.</span></div>
<div class="line"><a id="l00488" name="l00488"></a><span class="lineno">  488</span>  m_timer_worker(get_logger(), flow::util::ostream_op_string(*this)),</div>
<div class="line"><a id="l00489" name="l00489"></a><span class="lineno">  489</span>  m_control_state(false),</div>
<div class="line"><a id="l00490" name="l00490"></a><span class="lineno">  490</span>  m_target_control_blob(get_logger(), receive_blob_max_size()), <span class="comment">// See its doc header.</span></div>
<div class="line"><a id="l00491" name="l00491"></a><span class="lineno">  491</span>  m_idle_timeout(util::<a class="code hl_typedef" href="namespaceipc_1_1util.html#ac66141280c3b7295a86b65209f31cc58">Fine_duration</a>::zero()), <span class="comment">// idle_timer_run() not yet called.</span></div>
<div class="line"><a id="l00492" name="l00492"></a><span class="lineno">  492</span>  m_idle_timer(m_timer_worker.create_timer()), <span class="comment">// Inactive timer (idle_timer_run() not yet called).</span></div>
<div class="line"><a id="l00493" name="l00493"></a><span class="lineno">  493</span>  <span class="comment">/* If it does become active, we&#39;ll use this readable-pipe-peer to get informed by m_timer_worker that</span></div>
<div class="line"><a id="l00494" name="l00494"></a><span class="lineno">  494</span><span class="comment">   * m_idle_timer has fired.  That way we can use m_ev_wait_func() mechanism to have user</span></div>
<div class="line"><a id="l00495" name="l00495"></a><span class="lineno">  495</span><span class="comment">   * ferry timer firings to us. */</span></div>
<div class="line"><a id="l00496" name="l00496"></a><span class="lineno">  496</span>  m_idle_timer_fired_peer(m_timer_worker.create_timer_signal_pipe()),</div>
<div class="line"><a id="l00497" name="l00497"></a><span class="lineno">  497</span>  <span class="comment">// And this is its watchee mirror for outside event loop (sync_io pattern).</span></div>
<div class="line"><a id="l00498" name="l00498"></a><span class="lineno">  498</span>  m_ev_wait_hndl_idle_timer_fired_peer</div>
<div class="line"><a id="l00499" name="l00499"></a><span class="lineno">  499</span>    (m_ev_hndl_task_engine_unused,</div>
<div class="line"><a id="l00500" name="l00500"></a><span class="lineno">  500</span>     <a class="code hl_struct" href="structipc_1_1util_1_1Native__handle.html">Native_handle</a>(m_idle_timer_fired_peer-&gt;native_handle()))</div>
<div class="line"><a id="l00501" name="l00501"></a><span class="lineno">  501</span>{</div>
<div class="line"><a id="l00502" name="l00502"></a><span class="lineno">  502</span>  <span class="keyword">using </span>flow::error::Runtime_error;</div>
<div class="line"><a id="l00503" name="l00503"></a><span class="lineno">  503</span>  <span class="keyword">using </span>flow::util::ostream_op_string;</div>
<div class="line"><a id="l00504" name="l00504"></a><span class="lineno">  504</span>  <span class="keyword">using </span>boost::asio::connect_pipe;</div>
<div class="line"><a id="l00505" name="l00505"></a><span class="lineno">  505</span> </div>
<div class="line"><a id="l00506" name="l00506"></a><span class="lineno">  506</span>  <span class="comment">// This is near-identical to Blob_stream_mq_sender_impl ctor.  Keeping comments light.  @todo Code reuse.</span></div>
<div class="line"><a id="l00507" name="l00507"></a><span class="lineno">  507</span> </div>
<div class="line"><a id="l00508" name="l00508"></a><span class="lineno">  508</span>  <span class="keyword">auto</span>&amp; sys_err_code = <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a415d72c8ed4bed42fc84bf46f716742a">m_pending_err_code</a>;</div>
<div class="line"><a id="l00509" name="l00509"></a><span class="lineno">  509</span> </div>
<div class="line"><a id="l00510" name="l00510"></a><span class="lineno">  510</span>  <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ae71fa0a5594915910b0b8dd88743f62e">m_mq</a> = <a class="code hl_function" href="classipc_1_1transport_1_1Blob__stream__mq__base__impl.html#a4776b5f569ccac03eccb3fc2f360fcc9">Base::ensure_unique_peer</a>(get_logger(),</div>
<div class="line"><a id="l00511" name="l00511"></a><span class="lineno">  511</span>                                  std::move(mq), <span class="keyword">false</span> <span class="comment">/* receiver */</span>, &amp;sys_err_code); <span class="comment">// Does not throw.</span></div>
<div class="line"><a id="l00512" name="l00512"></a><span class="lineno">  512</span>  assert(<span class="keywordtype">bool</span>(<a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ae71fa0a5594915910b0b8dd88743f62e">m_mq</a>) == (!sys_err_code));</div>
<div class="line"><a id="l00513" name="l00513"></a><span class="lineno">  513</span>  <span class="comment">// On error *err_code will be truthy, and it will have returned null.</span></div>
<div class="line"><a id="l00514" name="l00514"></a><span class="lineno">  514</span> </div>
<div class="line"><a id="l00515" name="l00515"></a><span class="lineno">  515</span>  <span class="keywordflow">if</span> (!sys_err_code)</div>
<div class="line"><a id="l00516" name="l00516"></a><span class="lineno">  516</span>  {</div>
<div class="line"><a id="l00517" name="l00517"></a><span class="lineno">  517</span>    <span class="keywordflow">if</span> <span class="keyword">constexpr</span>(Mq::S_HAS_NATIVE_HANDLE)</div>
<div class="line"><a id="l00518" name="l00518"></a><span class="lineno">  518</span>    {</div>
<div class="line"><a id="l00519" name="l00519"></a><span class="lineno">  519</span>      <span class="comment">// Load up the FD into the watchee mirror.  See also replace_event_wait_handles().</span></div>
<div class="line"><a id="l00520" name="l00520"></a><span class="lineno">  520</span>      <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a87df1a6c9a98542a8fb00a9d85570c64">m_ev_wait_hndl_mq</a>.<a class="code hl_function" href="classipc_1_1util_1_1sync__io_1_1Asio__waitable__native__handle.html#a7d28277f9ef090032b0483c65f79f23c">assign</a>(<a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ae71fa0a5594915910b0b8dd88743f62e">m_mq</a>-&gt;native_handle());</div>
<div class="line"><a id="l00521" name="l00521"></a><span class="lineno">  521</span>    } <span class="comment">// if constexpr(Mq::S_HAS_NATIVE_HANDLE)</span></div>
<div class="line"><a id="l00522" name="l00522"></a><span class="lineno">  522</span>    <span class="keywordflow">else</span> <span class="comment">// if constexpr(!Mq::S_HAS_NATIVE_HANDLE)</span></div>
<div class="line"><a id="l00523" name="l00523"></a><span class="lineno">  523</span>    {</div>
<div class="line"><a id="l00524" name="l00524"></a><span class="lineno">  524</span>      <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a9f1120b92ea20944b2de416d870644ce">m_nb_task_engine</a>.emplace();</div>
<div class="line"><a id="l00525" name="l00525"></a><span class="lineno">  525</span>      <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#af742578435fde1d0c536196698ddbc75">m_mq_ready_reader</a>.emplace(*<a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a9f1120b92ea20944b2de416d870644ce">m_nb_task_engine</a>); <span class="comment">// No handle inside but will be set-up soon below.</span></div>
<div class="line"><a id="l00526" name="l00526"></a><span class="lineno">  526</span>      <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ac181b33a0b5cdb0e89753b62d86af50f">m_mq_ready_writer</a>.emplace(*<a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a9f1120b92ea20944b2de416d870644ce">m_nb_task_engine</a>); <span class="comment">// Ditto.</span></div>
<div class="line"><a id="l00527" name="l00527"></a><span class="lineno">  527</span> </div>
<div class="line"><a id="l00528" name="l00528"></a><span class="lineno">  528</span>      <span class="comment">// Start thread W, for when (and if) we need to use it to async-wait for transmissibility.</span></div>
<div class="line"><a id="l00529" name="l00529"></a><span class="lineno">  529</span>      <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ad233c7b57cbb817fb243bec5d338ec2e">m_blocking_worker</a>.emplace(get_logger(),</div>
<div class="line"><a id="l00530" name="l00530"></a><span class="lineno">  530</span>                                ostream_op_string(<span class="stringliteral">&quot;mq_rcv-&quot;</span>, <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#adaf3579ec3abf0b5d85258965d264660">nickname</a>())); <span class="comment">// Thread W started just below.</span></div>
<div class="line"><a id="l00531" name="l00531"></a><span class="lineno">  531</span>      <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ad233c7b57cbb817fb243bec5d338ec2e">m_blocking_worker</a>-&gt;start();</div>
<div class="line"><a id="l00532" name="l00532"></a><span class="lineno">  532</span> </div>
<div class="line"><a id="l00533" name="l00533"></a><span class="lineno">  533</span>      <span class="comment">// For now we just set up the IPC-pipe and the sync_io-watched FD mirror.  First things first... err, second....</span></div>
<div class="line"><a id="l00534" name="l00534"></a><span class="lineno">  534</span>      connect_pipe(*<a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#af742578435fde1d0c536196698ddbc75">m_mq_ready_reader</a>, *<a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ac181b33a0b5cdb0e89753b62d86af50f">m_mq_ready_writer</a>, sys_err_code);</div>
<div class="line"><a id="l00535" name="l00535"></a><span class="lineno">  535</span>      <span class="keywordflow">if</span> (sys_err_code)</div>
<div class="line"><a id="l00536" name="l00536"></a><span class="lineno">  536</span>      {</div>
<div class="line"><a id="l00537" name="l00537"></a><span class="lineno">  537</span>        FLOW_LOG_WARNING</div>
<div class="line"><a id="l00538" name="l00538"></a><span class="lineno">  538</span>          (<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Constructing: connect-pipe failed.  Details follow.&quot;</span>);</div>
<div class="line"><a id="l00539" name="l00539"></a><span class="lineno">  539</span>        FLOW_ERROR_SYS_ERROR_LOG_WARNING();</div>
<div class="line"><a id="l00540" name="l00540"></a><span class="lineno">  540</span> </div>
<div class="line"><a id="l00541" name="l00541"></a><span class="lineno">  541</span>        <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ae71fa0a5594915910b0b8dd88743f62e">m_mq</a>.reset(); <span class="comment">// Undo this.</span></div>
<div class="line"><a id="l00542" name="l00542"></a><span class="lineno">  542</span>      }</div>
<div class="line"><a id="l00543" name="l00543"></a><span class="lineno">  543</span>      <span class="keywordflow">else</span></div>
<div class="line"><a id="l00544" name="l00544"></a><span class="lineno">  544</span>      {</div>
<div class="line"><a id="l00545" name="l00545"></a><span class="lineno">  545</span>        <span class="comment">// Lastly load up the read-end FD into the watchee mirror.  See also replace_event_wait_handles().</span></div>
<div class="line"><a id="l00546" name="l00546"></a><span class="lineno">  546</span>        <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a87df1a6c9a98542a8fb00a9d85570c64">m_ev_wait_hndl_mq</a>.<a class="code hl_function" href="classipc_1_1util_1_1sync__io_1_1Asio__waitable__native__handle.html#a7d28277f9ef090032b0483c65f79f23c">assign</a>(<a class="code hl_typedef" href="namespaceipc_1_1transport.html#a7ee4551983d9df16ec16a3139bac50e8">Native_handle</a>(<a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#af742578435fde1d0c536196698ddbc75">m_mq_ready_reader</a>-&gt;native_handle()));</div>
<div class="line"><a id="l00547" name="l00547"></a><span class="lineno">  547</span>      }</div>
<div class="line"><a id="l00548" name="l00548"></a><span class="lineno">  548</span>    } <span class="comment">// if constexpr(!Mq::S_HAS_NATIVE_HANDLE)</span></div>
<div class="line"><a id="l00549" name="l00549"></a><span class="lineno">  549</span>  } <span class="comment">// if (!sys_err_code) (but it may have become truthy inside)</span></div>
<div class="line"><a id="l00550" name="l00550"></a><span class="lineno">  550</span> </div>
<div class="line"><a id="l00551" name="l00551"></a><span class="lineno">  551</span>  assert(<span class="keywordtype">bool</span>(<a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ae71fa0a5594915910b0b8dd88743f62e">m_mq</a>) == (!sys_err_code));</div>
<div class="line"><a id="l00552" name="l00552"></a><span class="lineno">  552</span> </div>
<div class="line"><a id="l00553" name="l00553"></a><span class="lineno">  553</span>  <span class="keywordflow">if</span> (!<a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ae71fa0a5594915910b0b8dd88743f62e">m_mq</a>)</div>
<div class="line"><a id="l00554" name="l00554"></a><span class="lineno">  554</span>  {</div>
<div class="line"><a id="l00555" name="l00555"></a><span class="lineno">  555</span>    <span class="comment">// `mq` is untouched.  m_pending_err_code will cause that to be emitted on async_receive_blob() and such.</span></div>
<div class="line"><a id="l00556" name="l00556"></a><span class="lineno">  556</span>    assert(sys_err_code);</div>
<div class="line"><a id="l00557" name="l00557"></a><span class="lineno">  557</span> </div>
<div class="line"><a id="l00558" name="l00558"></a><span class="lineno">  558</span>    <span class="keywordflow">if</span> (err_code)</div>
<div class="line"><a id="l00559" name="l00559"></a><span class="lineno">  559</span>    {</div>
<div class="line"><a id="l00560" name="l00560"></a><span class="lineno">  560</span>      *err_code = sys_err_code;</div>
<div class="line"><a id="l00561" name="l00561"></a><span class="lineno">  561</span>      <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00562" name="l00562"></a><span class="lineno">  562</span>    }</div>
<div class="line"><a id="l00563" name="l00563"></a><span class="lineno">  563</span>    <span class="comment">// else</span></div>
<div class="line"><a id="l00564" name="l00564"></a><span class="lineno">  564</span>    <span class="keywordflow">throw</span> Runtime_error(sys_err_code, <span class="stringliteral">&quot;Blob_stream_mq_receiver(): ensure_unique_peer()&quot;</span>);</div>
<div class="line"><a id="l00565" name="l00565"></a><span class="lineno">  565</span>  }</div>
<div class="line"><a id="l00566" name="l00566"></a><span class="lineno">  566</span>  <span class="comment">// else: took over `mq` ownership.</span></div>
<div class="line"><a id="l00567" name="l00567"></a><span class="lineno">  567</span>  assert(!sys_err_code);</div>
<div class="line"><a id="l00568" name="l00568"></a><span class="lineno">  568</span> </div>
<div class="line"><a id="l00569" name="l00569"></a><span class="lineno">  569</span>  FLOW_LOG_INFO(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: MQ-handle-watching apparatus ready including running &quot;</span></div>
<div class="line"><a id="l00570" name="l00570"></a><span class="lineno">  570</span>                <span class="stringliteral">&quot;blocking worker thread for would-block situations if necessary &quot;</span></div>
<div class="line"><a id="l00571" name="l00571"></a><span class="lineno">  571</span>                <span class="stringliteral">&quot;(is it? = [&quot;</span> &lt;&lt; (!Mq::S_HAS_NATIVE_HANDLE) &lt;&lt; <span class="stringliteral">&quot;]).&quot;</span>);</div>
<div class="line"><a id="l00572" name="l00572"></a><span class="lineno">  572</span>} <span class="comment">// Blob_stream_mq_receiver_impl::Blob_stream_mq_receiver()</span></div>
<div class="line"><a id="l00573" name="l00573"></a><span class="lineno">  573</span> </div>
<div class="line"><a id="l00574" name="l00574"></a><span class="lineno">  574</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Persistent_mq_handle&gt;</div>
<div class="line"><a id="l00575" name="l00575"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a08712e065d9a6778a0bb18de94009f22">  575</a></span><a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a08712e065d9a6778a0bb18de94009f22">Blob_stream_mq_receiver_impl&lt;Persistent_mq_handle&gt;::~Blob_stream_mq_receiver_impl</a>()</div>
<div class="line"><a id="l00576" name="l00576"></a><span class="lineno">  576</span>{</div>
<div class="line"><a id="l00577" name="l00577"></a><span class="lineno">  577</span>  <span class="comment">// This is near-identical to Blob_stream_mq_sender_impl dtor.  Keeping comments light.  @todo Code reuse.</span></div>
<div class="line"><a id="l00578" name="l00578"></a><span class="lineno">  578</span> </div>
<div class="line"><a id="l00579" name="l00579"></a><span class="lineno">  579</span>  <span class="keywordflow">if</span> <span class="keyword">constexpr</span>(!Mq::S_HAS_NATIVE_HANDLE)</div>
<div class="line"><a id="l00580" name="l00580"></a><span class="lineno">  580</span>  {</div>
<div class="line"><a id="l00581" name="l00581"></a><span class="lineno">  581</span>    FLOW_LOG_INFO(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Shutting down.  Async-wait worker thread and timer &quot;</span></div>
<div class="line"><a id="l00582" name="l00582"></a><span class="lineno">  582</span>                  <span class="stringliteral">&quot;thread will shut down/be joined shortly; but we must interrupt any currently-running async-wait to &quot;</span></div>
<div class="line"><a id="l00583" name="l00583"></a><span class="lineno">  583</span>                  <span class="stringliteral">&quot;ensure async-wait worker thread actually exits.&quot;</span>);</div>
<div class="line"><a id="l00584" name="l00584"></a><span class="lineno">  584</span> </div>
<div class="line"><a id="l00585" name="l00585"></a><span class="lineno">  585</span>    <span class="keywordflow">if</span> (m_mq)</div>
<div class="line"><a id="l00586" name="l00586"></a><span class="lineno">  586</span>    {</div>
<div class="line"><a id="l00587" name="l00587"></a><span class="lineno">  587</span>      m_mq-&gt;interrupt_receives();</div>
<div class="line"><a id="l00588" name="l00588"></a><span class="lineno">  588</span>    }</div>
<div class="line"><a id="l00589" name="l00589"></a><span class="lineno">  589</span>  } <span class="comment">// if constexpr(!Mq::S_HAS_NATIVE_HANDLE)</span></div>
<div class="line"><a id="l00590" name="l00590"></a><span class="lineno">  590</span>}</div>
<div class="line"><a id="l00591" name="l00591"></a><span class="lineno">  591</span> </div>
<div class="line"><a id="l00592" name="l00592"></a><span class="lineno">  592</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Persistent_mq_handle&gt;</div>
<div class="line"><a id="l00593" name="l00593"></a><span class="lineno">  593</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Create_ev_wait_hndl_func&gt;</div>
<div class="line"><a id="l00594" name="l00594"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a3ee71a39a443e78c86f82652d8d0601e">  594</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a3ee71a39a443e78c86f82652d8d0601e">Blob_stream_mq_receiver_impl&lt;Persistent_mq_handle&gt;::replace_event_wait_handles</a></div>
<div class="line"><a id="l00595" name="l00595"></a><span class="lineno">  595</span>       (<span class="keyword">const</span> Create_ev_wait_hndl_func&amp; create_ev_wait_hndl_func)</div>
<div class="line"><a id="l00596" name="l00596"></a><span class="lineno">  596</span>{</div>
<div class="line"><a id="l00597" name="l00597"></a><span class="lineno">  597</span>  <span class="keywordflow">if</span> (!m_ev_wait_func.empty())</div>
<div class="line"><a id="l00598" name="l00598"></a><span class="lineno">  598</span>  {</div>
<div class="line"><a id="l00599" name="l00599"></a><span class="lineno">  599</span>    FLOW_LOG_WARNING(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Cannot replace event-wait handles after &quot;</span></div>
<div class="line"><a id="l00600" name="l00600"></a><span class="lineno">  600</span>                     <span class="stringliteral">&quot;a start-*-ops procedure has been executed.  Ignoring.&quot;</span>);</div>
<div class="line"><a id="l00601" name="l00601"></a><span class="lineno">  601</span>    <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00602" name="l00602"></a><span class="lineno">  602</span>  }</div>
<div class="line"><a id="l00603" name="l00603"></a><span class="lineno">  603</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00604" name="l00604"></a><span class="lineno">  604</span> </div>
<div class="line"><a id="l00605" name="l00605"></a><span class="lineno">  605</span>  <span class="keywordflow">if</span> (m_pending_err_code)</div>
<div class="line"><a id="l00606" name="l00606"></a><span class="lineno">  606</span>  {</div>
<div class="line"><a id="l00607" name="l00607"></a><span class="lineno">  607</span>    <span class="comment">/* Ctor failed (without throwing, meaning they used the non-null-err_code semantic).</span></div>
<div class="line"><a id="l00608" name="l00608"></a><span class="lineno">  608</span><span class="comment">     * It is tempting to... &lt;see comment in _sender_impl same place.  @todo Code reuse. */</span></div>
<div class="line"><a id="l00609" name="l00609"></a><span class="lineno">  609</span>    FLOW_LOG_WARNING(<span class="stringliteral">&quot;Blob_stream_mq_sender [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Cannot replace event-wait handles as requested: &quot;</span></div>
<div class="line"><a id="l00610" name="l00610"></a><span class="lineno">  610</span>                     <span class="stringliteral">&quot;ctor failed earlier ([&quot;</span> &lt;&lt; m_pending_err_code &lt;&lt; <span class="stringliteral">&quot;] [&quot;</span> &lt;&lt; m_pending_err_code.message() &lt;&lt; <span class="stringliteral">&quot;].  &quot;</span></div>
<div class="line"><a id="l00611" name="l00611"></a><span class="lineno">  611</span>                     <span class="stringliteral">&quot;Any transmission attempts will fail in civilized fashion, so we will just no-op here.&quot;</span>);</div>
<div class="line"><a id="l00612" name="l00612"></a><span class="lineno">  612</span>    <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a id="l00613" name="l00613"></a><span class="lineno">  613</span>  }</div>
<div class="line"><a id="l00614" name="l00614"></a><span class="lineno">  614</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00615" name="l00615"></a><span class="lineno">  615</span> </div>
<div class="line"><a id="l00616" name="l00616"></a><span class="lineno">  616</span>  FLOW_LOG_INFO(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Replacing event-wait handles (probably to replace &quot;</span></div>
<div class="line"><a id="l00617" name="l00617"></a><span class="lineno">  617</span>                <span class="stringliteral">&quot;underlying execution context without outside event loop&#39;s boost.asio Task_engine or similar).&quot;</span>);</div>
<div class="line"><a id="l00618" name="l00618"></a><span class="lineno">  618</span> </div>
<div class="line"><a id="l00619" name="l00619"></a><span class="lineno">  619</span>  assert(m_ev_wait_hndl_mq.is_open());</div>
<div class="line"><a id="l00620" name="l00620"></a><span class="lineno">  620</span>  assert(m_ev_wait_hndl_idle_timer_fired_peer.is_open());</div>
<div class="line"><a id="l00621" name="l00621"></a><span class="lineno">  621</span> </div>
<div class="line"><a id="l00622" name="l00622"></a><span class="lineno">  622</span>  <a class="code hl_struct" href="structipc_1_1util_1_1Native__handle.html">Native_handle</a> saved(m_ev_wait_hndl_mq.release());</div>
<div class="line"><a id="l00623" name="l00623"></a><span class="lineno">  623</span>  m_ev_wait_hndl_mq = create_ev_wait_hndl_func();</div>
<div class="line"><a id="l00624" name="l00624"></a><span class="lineno">  624</span>  m_ev_wait_hndl_mq.assign(saved);</div>
<div class="line"><a id="l00625" name="l00625"></a><span class="lineno">  625</span> </div>
<div class="line"><a id="l00626" name="l00626"></a><span class="lineno">  626</span>  saved.<a class="code hl_variable" href="structipc_1_1util_1_1Native__handle.html#ab2f496740139c5752a25a30cf3325d86">m_native_handle</a> = m_ev_wait_hndl_idle_timer_fired_peer.release();</div>
<div class="line"><a id="l00627" name="l00627"></a><span class="lineno">  627</span>  m_ev_wait_hndl_idle_timer_fired_peer = create_ev_wait_hndl_func();</div>
<div class="line"><a id="l00628" name="l00628"></a><span class="lineno">  628</span>  m_ev_wait_hndl_idle_timer_fired_peer.assign(saved);</div>
<div class="line"><a id="l00629" name="l00629"></a><span class="lineno">  629</span> </div>
<div class="line"><a id="l00630" name="l00630"></a><span class="lineno">  630</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a id="l00631" name="l00631"></a><span class="lineno">  631</span>} <span class="comment">// Blob_stream_mq_receiver_impl::replace_event_wait_handles()</span></div>
<div class="line"><a id="l00632" name="l00632"></a><span class="lineno">  632</span> </div>
<div class="line"><a id="l00633" name="l00633"></a><span class="lineno">  633</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Persistent_mq_handle&gt;</div>
<div class="line"><a id="l00634" name="l00634"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a1e286f452b6e3a74d64e1f795795afe2">  634</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a1e286f452b6e3a74d64e1f795795afe2">Blob_stream_mq_receiver_impl&lt;Persistent_mq_handle&gt;::</a></div>
<div class="line"><a id="l00635" name="l00635"></a><span class="lineno">  635</span><a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a1e286f452b6e3a74d64e1f795795afe2">       start_receive_blob_ops</a>(<a class="code hl_typedef" href="namespaceipc_1_1util_1_1sync__io.html#aa0b9a3cc6bdc7dedbef4f9e06851aa24">util::sync_io::Event_wait_func</a>&amp;&amp; ev_wait_func)</div>
<div class="line"><a id="l00636" name="l00636"></a><span class="lineno">  636</span>{</div>
<div class="line"><a id="l00637" name="l00637"></a><span class="lineno">  637</span>  <span class="keywordflow">if</span> (!m_ev_wait_func.empty())</div>
<div class="line"><a id="l00638" name="l00638"></a><span class="lineno">  638</span>  {</div>
<div class="line"><a id="l00639" name="l00639"></a><span class="lineno">  639</span>    FLOW_LOG_WARNING(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Start-ops requested, &quot;</span></div>
<div class="line"><a id="l00640" name="l00640"></a><span class="lineno">  640</span>                     <span class="stringliteral">&quot;but we are already started.  Probably a user bug, but it is not for us to judge.&quot;</span>);</div>
<div class="line"><a id="l00641" name="l00641"></a><span class="lineno">  641</span>    <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00642" name="l00642"></a><span class="lineno">  642</span>  }</div>
<div class="line"><a id="l00643" name="l00643"></a><span class="lineno">  643</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00644" name="l00644"></a><span class="lineno">  644</span> </div>
<div class="line"><a id="l00645" name="l00645"></a><span class="lineno">  645</span>  m_ev_wait_func = std::move(ev_wait_func);</div>
<div class="line"><a id="l00646" name="l00646"></a><span class="lineno">  646</span> </div>
<div class="line"><a id="l00647" name="l00647"></a><span class="lineno">  647</span>  FLOW_LOG_INFO(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Start-ops requested.  Done.&quot;</span>);</div>
<div class="line"><a id="l00648" name="l00648"></a><span class="lineno">  648</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a id="l00649" name="l00649"></a><span class="lineno">  649</span>}</div>
<div class="line"><a id="l00650" name="l00650"></a><span class="lineno">  650</span> </div>
<div class="line"><a id="l00651" name="l00651"></a><span class="lineno">  651</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Persistent_mq_handle&gt;</div>
<div class="line"><a id="l00652" name="l00652"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a013d5b8cd991e0ba9d2e26a0f532fed8">  652</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a013d5b8cd991e0ba9d2e26a0f532fed8">Blob_stream_mq_receiver_impl&lt;Persistent_mq_handle&gt;::op_started</a>(<a class="code hl_typedef" href="namespaceipc_1_1util.html#ae6ac47812a90d1287c61e0b7de7bc4f5">util::String_view</a> context)<span class="keyword"> const</span></div>
<div class="line"><a id="l00653" name="l00653"></a><span class="lineno">  653</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00654" name="l00654"></a><span class="lineno">  654</span>  <span class="keywordflow">if</span> (m_ev_wait_func.empty())</div>
<div class="line"><a id="l00655" name="l00655"></a><span class="lineno">  655</span>  {</div>
<div class="line"><a id="l00656" name="l00656"></a><span class="lineno">  656</span>    FLOW_LOG_WARNING(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: &quot;</span></div>
<div class="line"><a id="l00657" name="l00657"></a><span class="lineno">  657</span>                     <span class="stringliteral">&quot;In context [&quot;</span> &lt;&lt; context &lt;&lt; <span class="stringliteral">&quot;] we must be start_...()ed, &quot;</span></div>
<div class="line"><a id="l00658" name="l00658"></a><span class="lineno">  658</span>                     <span class="stringliteral">&quot;but we are not.  Probably a user bug, but it is not for us to judge.&quot;</span>);</div>
<div class="line"><a id="l00659" name="l00659"></a><span class="lineno">  659</span>    <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00660" name="l00660"></a><span class="lineno">  660</span>  }</div>
<div class="line"><a id="l00661" name="l00661"></a><span class="lineno">  661</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00662" name="l00662"></a><span class="lineno">  662</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a id="l00663" name="l00663"></a><span class="lineno">  663</span>}</div>
<div class="line"><a id="l00664" name="l00664"></a><span class="lineno">  664</span> </div>
<div class="line"><a id="l00665" name="l00665"></a><span class="lineno">  665</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Persistent_mq_handle&gt;</div>
<div class="line"><a id="l00666" name="l00666"></a><span class="lineno">  666</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Task_err_sz&gt;</div>
<div class="line"><a id="l00667" name="l00667"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a8d1a81d379e1a31031adb9cccbbabd35">  667</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a8d1a81d379e1a31031adb9cccbbabd35">Blob_stream_mq_receiver_impl&lt;Persistent_mq_handle&gt;::async_receive_blob</a></div>
<div class="line"><a id="l00668" name="l00668"></a><span class="lineno">  668</span>       (<span class="keyword">const</span> <a class="code hl_typedef" href="namespaceipc_1_1util.html#a6cb62ae434900f3a8915b33ec5d61a96">util::Blob_mutable</a>&amp; target_blob, <a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a>* sync_err_code_ptr, <span class="keywordtype">size_t</span>* sync_sz,</div>
<div class="line"><a id="l00669" name="l00669"></a><span class="lineno">  669</span>        Task_err_sz&amp;&amp; on_done_func)</div>
<div class="line"><a id="l00670" name="l00670"></a><span class="lineno">  670</span>{</div>
<div class="line"><a id="l00671" name="l00671"></a><span class="lineno">  671</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceipc_1_1util.html#a6cb62ae434900f3a8915b33ec5d61a96">util::Blob_mutable</a>;</div>
<div class="line"><a id="l00672" name="l00672"></a><span class="lineno">  672</span> </div>
<div class="line"><a id="l00673" name="l00673"></a><span class="lineno">  673</span>  <span class="keywordflow">if</span> (!op_started(<span class="stringliteral">&quot;async_receive_blob()&quot;</span>))</div>
<div class="line"><a id="l00674" name="l00674"></a><span class="lineno">  674</span>  {</div>
<div class="line"><a id="l00675" name="l00675"></a><span class="lineno">  675</span>    <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00676" name="l00676"></a><span class="lineno">  676</span>  }</div>
<div class="line"><a id="l00677" name="l00677"></a><span class="lineno">  677</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00678" name="l00678"></a><span class="lineno">  678</span> </div>
<div class="line"><a id="l00679" name="l00679"></a><span class="lineno">  679</span>  <span class="comment">/* We comment liberally, but tactically, inline; but please read the strategy in the class doc header&#39;s impl section.</span></div>
<div class="line"><a id="l00680" name="l00680"></a><span class="lineno">  680</span><span class="comment">   *</span></div>
<div class="line"><a id="l00681" name="l00681"></a><span class="lineno">  681</span><span class="comment">   * Briefly though: If you understand opposing send_blob() impl, then this will be easy in comparison:</span></div>
<div class="line"><a id="l00682" name="l00682"></a><span class="lineno">  682</span><span class="comment">   * no more than one async_receive_blob() can be outstanding at a time; they are not allowed to</span></div>
<div class="line"><a id="l00683" name="l00683"></a><span class="lineno">  683</span><span class="comment">   * invoke it until we invoke their completion handler.  (Rationale is shown in detail elsewhere.)</span></div>
<div class="line"><a id="l00684" name="l00684"></a><span class="lineno">  684</span><span class="comment">   * So there is no queuing of requests (deficit); nor reading more messages beyond what has been requested</span></div>
<div class="line"><a id="l00685" name="l00685"></a><span class="lineno">  685</span><span class="comment">   * (surplus).</span></div>
<div class="line"><a id="l00686" name="l00686"></a><span class="lineno">  686</span><span class="comment">   *</span></div>
<div class="line"><a id="l00687" name="l00687"></a><span class="lineno">  687</span><span class="comment">   * That said, we must inform them of completion via on_done_func(), whereas send_blob() has no</span></div>
<div class="line"><a id="l00688" name="l00688"></a><span class="lineno">  688</span><span class="comment">   * such requirement; easy enough -- we just save it as needed.  In that sense it is much like</span></div>
<div class="line"><a id="l00689" name="l00689"></a><span class="lineno">  689</span><span class="comment">   * opposing async_end_sending().</span></div>
<div class="line"><a id="l00690" name="l00690"></a><span class="lineno">  690</span><span class="comment">   *</span></div>
<div class="line"><a id="l00691" name="l00691"></a><span class="lineno">  691</span><span class="comment">   * ...Well, no, there&#39;s one more complicating matter -- though it&#39;s nowhere near as hairy as what rcv-side of</span></div>
<div class="line"><a id="l00692" name="l00692"></a><span class="lineno">  692</span><span class="comment">   * Native_socket_stream::Impl has to deal with:  Sure, there is no queuing of requests, but the outgoing-direction</span></div>
<div class="line"><a id="l00693" name="l00693"></a><span class="lineno">  693</span><span class="comment">   * algorithm makes the low-level payloads and then just sends them out -- what&#39;s inside doesn&#39;t matter (almost).</span></div>
<div class="line"><a id="l00694" name="l00694"></a><span class="lineno">  694</span><span class="comment">   * Incoming-direction is harder, because we need to read payload 1, interpret it, possibly read payload 2.</span></div>
<div class="line"><a id="l00695" name="l00695"></a><span class="lineno">  695</span><span class="comment">   * So there is a bit of tactical nonsense about async-waiting and then resuming from the same spot and so on.</span></div>
<div class="line"><a id="l00696" name="l00696"></a><span class="lineno">  696</span><span class="comment">   * However, unlike with Native_socket_stream::Impl our message boundaries are always preserved, so it is a ton</span></div>
<div class="line"><a id="l00697" name="l00697"></a><span class="lineno">  697</span><span class="comment">   * simpler.  Basically it&#39;s just a matter of keeping track of the flag m_control_state and acting differently</span></div>
<div class="line"><a id="l00698" name="l00698"></a><span class="lineno">  698</span><span class="comment">   * depending on whether it&#39;s true or not (when analyzing an incoming low-level payload). */</span></div>
<div class="line"><a id="l00699" name="l00699"></a><span class="lineno">  699</span> </div>
<div class="line"><a id="l00700" name="l00700"></a><span class="lineno">  700</span>  <span class="keywordflow">if</span> (m_user_request)</div>
<div class="line"><a id="l00701" name="l00701"></a><span class="lineno">  701</span>  {</div>
<div class="line"><a id="l00702" name="l00702"></a><span class="lineno">  702</span>    FLOW_LOG_WARNING(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Async-receive requested, but the preceding such &quot;</span></div>
<div class="line"><a id="l00703" name="l00703"></a><span class="lineno">  703</span>                     <span class="stringliteral">&quot;request is still in progress; the message has not arrived yet (we are awaiting &quot;</span></div>
<div class="line"><a id="l00704" name="l00704"></a><span class="lineno">  704</span>                     <span class="stringliteral">&quot;readability, before we can get the rest of it).  Likely a user error, but who are &quot;</span></div>
<div class="line"><a id="l00705" name="l00705"></a><span class="lineno">  705</span>                     <span class="stringliteral">&quot;we to judge?  Ignoring.&quot;</span>);</div>
<div class="line"><a id="l00706" name="l00706"></a><span class="lineno">  706</span>    <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00707" name="l00707"></a><span class="lineno">  707</span>  }</div>
<div class="line"><a id="l00708" name="l00708"></a><span class="lineno">  708</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00709" name="l00709"></a><span class="lineno">  709</span> </div>
<div class="line"><a id="l00710" name="l00710"></a><span class="lineno">  710</span>  <a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a> sync_err_code;</div>
<div class="line"><a id="l00711" name="l00711"></a><span class="lineno">  711</span> </div>
<div class="line"><a id="l00712" name="l00712"></a><span class="lineno">  712</span>  FLOW_LOG_TRACE(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: User async-receive request for &quot;</span></div>
<div class="line"><a id="l00713" name="l00713"></a><span class="lineno">  713</span>                 <span class="stringliteral">&quot;blob (located @ [&quot;</span> &lt;&lt; target_blob.data() &lt;&lt; <span class="stringliteral">&quot;] of max size [&quot;</span> &lt;&lt; target_blob.size() &lt;&lt; <span class="stringliteral">&quot;]).&quot;</span>);</div>
<div class="line"><a id="l00714" name="l00714"></a><span class="lineno">  714</span> </div>
<div class="line"><a id="l00715" name="l00715"></a><span class="lineno">  715</span>  <span class="keywordflow">if</span> (m_pending_err_code)</div>
<div class="line"><a id="l00716" name="l00716"></a><span class="lineno">  716</span>  {</div>
<div class="line"><a id="l00717" name="l00717"></a><span class="lineno">  717</span>    FLOW_LOG_WARNING(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: User async-receive request for &quot;</span></div>
<div class="line"><a id="l00718" name="l00718"></a><span class="lineno">  718</span>                     <span class="stringliteral">&quot;blob (located @ [&quot;</span> &lt;&lt; target_blob.data() &lt;&lt; <span class="stringliteral">&quot;] of &quot;</span></div>
<div class="line"><a id="l00719" name="l00719"></a><span class="lineno">  719</span>                     <span class="stringliteral">&quot;max size [&quot;</span> &lt;&lt; target_blob.size() &lt;&lt; <span class="stringliteral">&quot;]): Error already encountered earlier.  Emitting &quot;</span></div>
<div class="line"><a id="l00720" name="l00720"></a><span class="lineno">  720</span>                     <span class="stringliteral">&quot;via sync-args.&quot;</span>);</div>
<div class="line"><a id="l00721" name="l00721"></a><span class="lineno">  721</span> </div>
<div class="line"><a id="l00722" name="l00722"></a><span class="lineno">  722</span>    sync_err_code = m_pending_err_code;</div>
<div class="line"><a id="l00723" name="l00723"></a><span class="lineno">  723</span>    *sync_sz = 0;</div>
<div class="line"><a id="l00724" name="l00724"></a><span class="lineno">  724</span>  }</div>
<div class="line"><a id="l00725" name="l00725"></a><span class="lineno">  725</span>  <span class="keywordflow">else</span> <span class="comment">// if (!m_pending_err_code)</span></div>
<div class="line"><a id="l00726" name="l00726"></a><span class="lineno">  726</span>  {</div>
<div class="line"><a id="l00727" name="l00727"></a><span class="lineno">  727</span>    <span class="comment">// This next check: background can be found by following the comment on this concept constant.</span></div>
<div class="line"><a id="l00728" name="l00728"></a><span class="lineno">  728</span>    <span class="keyword">static_assert</span>(!<a class="code hl_class" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver.html">Blob_stream_mq_receiver&lt;Mq&gt;::S_BLOB_UNDERFLOW_ALLOWED</a>,</div>
<div class="line"><a id="l00729" name="l00729"></a><span class="lineno">  729</span>                   <span class="stringliteral">&quot;MQs disallow even trying to receive into a buffer that could underflow &quot;</span></div>
<div class="line"><a id="l00730" name="l00730"></a><span class="lineno">  730</span>                     <span class="stringliteral">&quot;with the largest *possible* message -- even if the actual message &quot;</span></div>
<div class="line"><a id="l00731" name="l00731"></a><span class="lineno">  731</span>                     <span class="stringliteral">&quot;happens to be small enough to fit.&quot;</span>);</div>
<div class="line"><a id="l00732" name="l00732"></a><span class="lineno">  732</span>    <span class="keywordflow">if</span> (target_blob.size() &lt; receive_blob_max_size())</div>
<div class="line"><a id="l00733" name="l00733"></a><span class="lineno">  733</span>    {</div>
<div class="line"><a id="l00734" name="l00734"></a><span class="lineno">  734</span>      FLOW_LOG_WARNING(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: User async-receive request for &quot;</span></div>
<div class="line"><a id="l00735" name="l00735"></a><span class="lineno">  735</span>                       <span class="stringliteral">&quot;blob (located @ [&quot;</span> &lt;&lt; target_blob.data() &lt;&lt; <span class="stringliteral">&quot;] of &quot;</span></div>
<div class="line"><a id="l00736" name="l00736"></a><span class="lineno">  736</span>                       <span class="stringliteral">&quot;max size [&quot;</span> &lt;&lt; target_blob.size() &lt;&lt; <span class="stringliteral">&quot;]): &quot;</span></div>
<div class="line"><a id="l00737" name="l00737"></a><span class="lineno">  737</span>                       <span class="stringliteral">&quot;that size underflows MQ size limit [&quot;</span> &lt;&lt; receive_blob_max_size() &lt;&lt; <span class="stringliteral">&quot;].  &quot;</span></div>
<div class="line"><a id="l00738" name="l00738"></a><span class="lineno">  738</span>                       <span class="stringliteral">&quot;Emitting error immediately; but pipe continues.  Note that if we don&#39;t do this, &quot;</span></div>
<div class="line"><a id="l00739" name="l00739"></a><span class="lineno">  739</span>                       <span class="stringliteral">&quot;then the low-level MQ will behave this way anyway.&quot;</span>);</div>
<div class="line"><a id="l00740" name="l00740"></a><span class="lineno">  740</span>      <span class="comment">// As mandated by concept *do not* hose pipe by setting m_pending_err_code given INVALID_ARGUMENT.  Just emit.</span></div>
<div class="line"><a id="l00741" name="l00741"></a><span class="lineno">  741</span> </div>
<div class="line"><a id="l00742" name="l00742"></a><span class="lineno">  742</span>      sync_err_code = <a class="code hl_enumvalue" href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297ac416e988563e44bf15fc6a81743eef53">error::Code::S_INVALID_ARGUMENT</a>;</div>
<div class="line"><a id="l00743" name="l00743"></a><span class="lineno">  743</span>      *sync_sz = 0;</div>
<div class="line"><a id="l00744" name="l00744"></a><span class="lineno">  744</span>    }</div>
<div class="line"><a id="l00745" name="l00745"></a><span class="lineno">  745</span>    <span class="keywordflow">else</span></div>
<div class="line"><a id="l00746" name="l00746"></a><span class="lineno">  746</span>    {</div>
<div class="line"><a id="l00747" name="l00747"></a><span class="lineno">  747</span>      m_user_request.emplace();</div>
<div class="line"><a id="l00748" name="l00748"></a><span class="lineno">  748</span>      m_user_request-&gt;m_target_blob = target_blob;</div>
<div class="line"><a id="l00749" name="l00749"></a><span class="lineno">  749</span>      m_user_request-&gt;m_on_done_func = std::move(on_done_func);</div>
<div class="line"><a id="l00750" name="l00750"></a><span class="lineno">  750</span> </div>
<div class="line"><a id="l00751" name="l00751"></a><span class="lineno">  751</span>      read_msg(&amp;sync_err_code, sync_sz);</div>
<div class="line"><a id="l00752" name="l00752"></a><span class="lineno">  752</span>    } <span class="comment">// else if (target_blob.size() is fine)</span></div>
<div class="line"><a id="l00753" name="l00753"></a><span class="lineno">  753</span>  } <span class="comment">// else if (!m_pending_err_code)</span></div>
<div class="line"><a id="l00754" name="l00754"></a><span class="lineno">  754</span> </div>
<div class="line"><a id="l00755" name="l00755"></a><span class="lineno">  755</span>  <span class="keywordflow">if</span> ((!sync_err_code) || (sync_err_code != <a class="code hl_enumvalue" href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297aa667487757f9d6300f6888bac40bcc24">error::Code::S_SYNC_IO_WOULD_BLOCK</a>))</div>
<div class="line"><a id="l00756" name="l00756"></a><span class="lineno">  756</span>  {</div>
<div class="line"><a id="l00757" name="l00757"></a><span class="lineno">  757</span>    FLOW_LOG_TRACE(<span class="stringliteral">&quot;Async-request completed synchronously (result &quot;</span></div>
<div class="line"><a id="l00758" name="l00758"></a><span class="lineno">  758</span>                    <span class="stringliteral">&quot;[&quot;</span> &lt;&lt; sync_err_code &lt;&lt; <span class="stringliteral">&quot;] [&quot;</span> &lt;&lt; sync_err_code.message() &lt;&lt; <span class="stringliteral">&quot;]); emitting synchronously and &quot;</span></div>
<div class="line"><a id="l00759" name="l00759"></a><span class="lineno">  759</span>                    <span class="stringliteral">&quot;disregarding handler.&quot;</span>);</div>
<div class="line"><a id="l00760" name="l00760"></a><span class="lineno">  760</span>    m_user_request.reset(); <span class="comment">// No-op if we didn&#39;t set it up due to early error being detected above.</span></div>
<div class="line"><a id="l00761" name="l00761"></a><span class="lineno">  761</span>  }</div>
<div class="line"><a id="l00762" name="l00762"></a><span class="lineno">  762</span>  <span class="comment">// else { Other stuff logged enough. }</span></div>
<div class="line"><a id="l00763" name="l00763"></a><span class="lineno">  763</span> </div>
<div class="line"><a id="l00764" name="l00764"></a><span class="lineno">  764</span>  <span class="comment">// Standard error-reporting semantics.</span></div>
<div class="line"><a id="l00765" name="l00765"></a><span class="lineno">  765</span>  <span class="keywordflow">if</span> ((!sync_err_code_ptr) &amp;&amp; sync_err_code)</div>
<div class="line"><a id="l00766" name="l00766"></a><span class="lineno">  766</span>  {</div>
<div class="line"><a id="l00767" name="l00767"></a><span class="lineno">  767</span>    <span class="keywordflow">throw</span> flow::error::Runtime_error(sync_err_code, <span class="stringliteral">&quot;Blob_stream_mq_receiver_impl::async_receive_blob()&quot;</span>);</div>
<div class="line"><a id="l00768" name="l00768"></a><span class="lineno">  768</span>  }</div>
<div class="line"><a id="l00769" name="l00769"></a><span class="lineno">  769</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00770" name="l00770"></a><span class="lineno">  770</span>  sync_err_code_ptr &amp;&amp; (*sync_err_code_ptr = sync_err_code);</div>
<div class="line"><a id="l00771" name="l00771"></a><span class="lineno">  771</span>  <span class="comment">// And if (!sync_err_code_ptr) + no error =&gt; no throw.</span></div>
<div class="line"><a id="l00772" name="l00772"></a><span class="lineno">  772</span> </div>
<div class="line"><a id="l00773" name="l00773"></a><span class="lineno">  773</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a id="l00774" name="l00774"></a><span class="lineno">  774</span>} <span class="comment">// Blob_stream_mq_receiver_impl::async_receive_blob()</span></div>
<div class="line"><a id="l00775" name="l00775"></a><span class="lineno">  775</span> </div>
<div class="line"><a id="l00776" name="l00776"></a><span class="lineno">  776</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Persistent_mq_handle&gt;</div>
<div class="line"><a id="l00777" name="l00777"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a878fa03873bcdea5aa9d938a4791325f">  777</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a878fa03873bcdea5aa9d938a4791325f">Blob_stream_mq_receiver_impl&lt;Persistent_mq_handle&gt;::idle_timer_run</a>(<a class="code hl_typedef" href="namespaceipc_1_1util.html#ac66141280c3b7295a86b65209f31cc58">util::Fine_duration</a> timeout)</div>
<div class="line"><a id="l00778" name="l00778"></a><span class="lineno">  778</span>{</div>
<div class="line"><a id="l00779" name="l00779"></a><span class="lineno">  779</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceipc_1_1util.html#ac66141280c3b7295a86b65209f31cc58">util::Fine_duration</a>;</div>
<div class="line"><a id="l00780" name="l00780"></a><span class="lineno">  780</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceipc_1_1util.html#a31e67d3a017477a04b313927e2f2c733">util::Task</a>;</div>
<div class="line"><a id="l00781" name="l00781"></a><span class="lineno">  781</span>  <span class="keyword">using </span>boost::chrono::round;</div>
<div class="line"><a id="l00782" name="l00782"></a><span class="lineno">  782</span>  <span class="keyword">using </span>boost::chrono::milliseconds;</div>
<div class="line"><a id="l00783" name="l00783"></a><span class="lineno">  783</span> </div>
<div class="line"><a id="l00784" name="l00784"></a><span class="lineno">  784</span>  <span class="comment">// We comment liberally, but tactically, inline; but please read the strategy in the class doc header&#39;s impl section.</span></div>
<div class="line"><a id="l00785" name="l00785"></a><span class="lineno">  785</span> </div>
<div class="line"><a id="l00786" name="l00786"></a><span class="lineno">  786</span>  assert(timeout.count() &gt; 0);</div>
<div class="line"><a id="l00787" name="l00787"></a><span class="lineno">  787</span> </div>
<div class="line"><a id="l00788" name="l00788"></a><span class="lineno">  788</span>  <span class="keywordflow">if</span> (!op_started(<span class="stringliteral">&quot;idle_timer_run()&quot;</span>))</div>
<div class="line"><a id="l00789" name="l00789"></a><span class="lineno">  789</span>  {</div>
<div class="line"><a id="l00790" name="l00790"></a><span class="lineno">  790</span>    <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00791" name="l00791"></a><span class="lineno">  791</span>  }</div>
<div class="line"><a id="l00792" name="l00792"></a><span class="lineno">  792</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00793" name="l00793"></a><span class="lineno">  793</span> </div>
<div class="line"><a id="l00794" name="l00794"></a><span class="lineno">  794</span>  <span class="comment">// According to concept requirements we shall no-op/return false if duplicately called.</span></div>
<div class="line"><a id="l00795" name="l00795"></a><span class="lineno">  795</span>  <span class="keywordflow">if</span> (m_idle_timeout != Fine_duration::zero())</div>
<div class="line"><a id="l00796" name="l00796"></a><span class="lineno">  796</span>  {</div>
<div class="line"><a id="l00797" name="l00797"></a><span class="lineno">  797</span>    FLOW_LOG_WARNING(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: User wants to start idle timer, but they have &quot;</span></div>
<div class="line"><a id="l00798" name="l00798"></a><span class="lineno">  798</span>                     <span class="stringliteral">&quot;already started it before.  Therefore ignoring.&quot;</span>);</div>
<div class="line"><a id="l00799" name="l00799"></a><span class="lineno">  799</span>    <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00800" name="l00800"></a><span class="lineno">  800</span>  }</div>
<div class="line"><a id="l00801" name="l00801"></a><span class="lineno">  801</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00802" name="l00802"></a><span class="lineno">  802</span> </div>
<div class="line"><a id="l00803" name="l00803"></a><span class="lineno">  803</span>  m_idle_timeout = timeout; <span class="comment">// Remember this, both as flag (non-zero()) and to know to when to schedule it.</span></div>
<div class="line"><a id="l00804" name="l00804"></a><span class="lineno">  804</span>  <span class="comment">// Now we will definitely return true (even if an error is already pending).  This matches concept requirements.</span></div>
<div class="line"><a id="l00805" name="l00805"></a><span class="lineno">  805</span> </div>
<div class="line"><a id="l00806" name="l00806"></a><span class="lineno">  806</span>  <span class="keywordflow">if</span> (m_pending_err_code)</div>
<div class="line"><a id="l00807" name="l00807"></a><span class="lineno">  807</span>  {</div>
<div class="line"><a id="l00808" name="l00808"></a><span class="lineno">  808</span>    FLOW_LOG_INFO(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: User wants to start idle timer, but an error has &quot;</span></div>
<div class="line"><a id="l00809" name="l00809"></a><span class="lineno">  809</span>                  <span class="stringliteral">&quot;already been found and emitted earlier.  It&#39;s moot; ignoring.&quot;</span>);</div>
<div class="line"><a id="l00810" name="l00810"></a><span class="lineno">  810</span>    <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a id="l00811" name="l00811"></a><span class="lineno">  811</span>  }</div>
<div class="line"><a id="l00812" name="l00812"></a><span class="lineno">  812</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00813" name="l00813"></a><span class="lineno">  813</span> </div>
<div class="line"><a id="l00814" name="l00814"></a><span class="lineno">  814</span>  FLOW_LOG_INFO(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: User wants to start idle-timer with timeout &quot;</span></div>
<div class="line"><a id="l00815" name="l00815"></a><span class="lineno">  815</span>                <span class="stringliteral">&quot;[&quot;</span> &lt;&lt; round&lt;milliseconds&gt;(m_idle_timeout) &lt;&lt; <span class="stringliteral">&quot;].  Scheduling (will be rescheduled as needed).&quot;</span>);</div>
<div class="line"><a id="l00816" name="l00816"></a><span class="lineno">  816</span> </div>
<div class="line"><a id="l00817" name="l00817"></a><span class="lineno">  817</span>  <span class="comment">/* Per requirements in concept, start it now; reschedule similarly each time there is activity.</span></div>
<div class="line"><a id="l00818" name="l00818"></a><span class="lineno">  818</span><span class="comment">   *</span></div>
<div class="line"><a id="l00819" name="l00819"></a><span class="lineno">  819</span><span class="comment">   * The mechanics of timer-scheduling are identical to those in opposing auto_ping() and are explained there;</span></div>
<div class="line"><a id="l00820" name="l00820"></a><span class="lineno">  820</span><span class="comment">   * keeping comments light here. */</span></div>
<div class="line"><a id="l00821" name="l00821"></a><span class="lineno">  821</span> </div>
<div class="line"><a id="l00822" name="l00822"></a><span class="lineno">  822</span>  m_ev_wait_func(&amp;m_ev_wait_hndl_idle_timer_fired_peer,</div>
<div class="line"><a id="l00823" name="l00823"></a><span class="lineno">  823</span>                 <span class="keyword">false</span>, <span class="comment">// Wait for read.</span></div>
<div class="line"><a id="l00824" name="l00824"></a><span class="lineno">  824</span>                 boost::make_shared&lt;Task&gt;</div>
<div class="line"><a id="l00825" name="l00825"></a><span class="lineno">  825</span>                   ([<span class="keyword">this</span>]() { on_ev_idle_timer_fired(); }));</div>
<div class="line"><a id="l00826" name="l00826"></a><span class="lineno">  826</span> </div>
<div class="line"><a id="l00827" name="l00827"></a><span class="lineno">  827</span>  m_idle_timer.expires_after(m_idle_timeout);</div>
<div class="line"><a id="l00828" name="l00828"></a><span class="lineno">  828</span>  m_timer_worker.timer_async_wait(&amp;m_idle_timer, m_idle_timer_fired_peer);</div>
<div class="line"><a id="l00829" name="l00829"></a><span class="lineno">  829</span> </div>
<div class="line"><a id="l00830" name="l00830"></a><span class="lineno">  830</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a id="l00831" name="l00831"></a><span class="lineno">  831</span>} <span class="comment">// Blob_stream_mq_receiver_impl::idle_timer_run()</span></div>
<div class="line"><a id="l00832" name="l00832"></a><span class="lineno">  832</span> </div>
<div class="line"><a id="l00833" name="l00833"></a><span class="lineno">  833</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Persistent_mq_handle&gt;</div>
<div class="line"><a id="l00834" name="l00834"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a5c46890c19e4fe69d9276647205af786">  834</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a5c46890c19e4fe69d9276647205af786">Blob_stream_mq_receiver_impl&lt;Persistent_mq_handle&gt;::on_ev_idle_timer_fired</a>()</div>
<div class="line"><a id="l00835" name="l00835"></a><span class="lineno">  835</span>{</div>
<div class="line"><a id="l00836" name="l00836"></a><span class="lineno">  836</span>  <span class="comment">/* This is an event handler!  Specifically for the *m_idle_timer_fired_peer pipe reader being</span></div>
<div class="line"><a id="l00837" name="l00837"></a><span class="lineno">  837</span><span class="comment">   * readable.  To avoid infinite-loopiness, we&#39;d best pop the thing that was written there. */</span></div>
<div class="line"><a id="l00838" name="l00838"></a><span class="lineno">  838</span>  m_timer_worker.consume_timer_firing_signal(m_idle_timer_fired_peer);</div>
<div class="line"><a id="l00839" name="l00839"></a><span class="lineno">  839</span> </div>
<div class="line"><a id="l00840" name="l00840"></a><span class="lineno">  840</span>  <span class="keywordflow">if</span> (m_pending_err_code)</div>
<div class="line"><a id="l00841" name="l00841"></a><span class="lineno">  841</span>  {</div>
<div class="line"><a id="l00842" name="l00842"></a><span class="lineno">  842</span>    FLOW_LOG_TRACE(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Idle timer fired: There&#39;s been 0 traffic past idle &quot;</span></div>
<div class="line"><a id="l00843" name="l00843"></a><span class="lineno">  843</span>                   <span class="stringliteral">&quot;timeout.  However an error has already been found and emitted earlier.  Therefore ignoring.&quot;</span>);</div>
<div class="line"><a id="l00844" name="l00844"></a><span class="lineno">  844</span>    <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00845" name="l00845"></a><span class="lineno">  845</span>  }</div>
<div class="line"><a id="l00846" name="l00846"></a><span class="lineno">  846</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00847" name="l00847"></a><span class="lineno">  847</span> </div>
<div class="line"><a id="l00848" name="l00848"></a><span class="lineno">  848</span>  m_pending_err_code = <a class="code hl_enumvalue" href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297aba920b52e9801e4927dd346ad83ce815">error::Code::S_RECEIVER_IDLE_TIMEOUT</a>;</div>
<div class="line"><a id="l00849" name="l00849"></a><span class="lineno">  849</span> </div>
<div class="line"><a id="l00850" name="l00850"></a><span class="lineno">  850</span>  FLOW_LOG_WARNING(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Idle timer fired: There&#39;s been 0 traffic past idle &quot;</span></div>
<div class="line"><a id="l00851" name="l00851"></a><span class="lineno">  851</span>                   <span class="stringliteral">&quot;timeout.  Will not proceed with any further low-level receiving.  If a user async-receive request &quot;</span></div>
<div class="line"><a id="l00852" name="l00852"></a><span class="lineno">  852</span>                   <span class="stringliteral">&quot;is pending (is it? = [&quot;</span> &lt;&lt; <span class="keywordtype">bool</span>(m_user_request) &lt;&lt; <span class="stringliteral">&quot;]) will emit to completion handler.&quot;</span>);</div>
<div class="line"><a id="l00853" name="l00853"></a><span class="lineno">  853</span> </div>
<div class="line"><a id="l00854" name="l00854"></a><span class="lineno">  854</span>  <span class="keywordflow">if</span> (m_user_request)</div>
<div class="line"><a id="l00855" name="l00855"></a><span class="lineno">  855</span>  {</div>
<div class="line"><a id="l00856" name="l00856"></a><span class="lineno">  856</span>    <span class="comment">// Prevent stepping on our own toes: move/clear it first / invoke handler second.</span></div>
<div class="line"><a id="l00857" name="l00857"></a><span class="lineno">  857</span>    <span class="keyword">const</span> <span class="keyword">auto</span> on_done_func = std::move(m_user_request-&gt;m_on_done_func);</div>
<div class="line"><a id="l00858" name="l00858"></a><span class="lineno">  858</span>    m_user_request.reset();</div>
<div class="line"><a id="l00859" name="l00859"></a><span class="lineno">  859</span>    on_done_func(m_pending_err_code, 0);</div>
<div class="line"><a id="l00860" name="l00860"></a><span class="lineno">  860</span>    FLOW_LOG_TRACE(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Handler completed.&quot;</span>);</div>
<div class="line"><a id="l00861" name="l00861"></a><span class="lineno">  861</span>  }</div>
<div class="line"><a id="l00862" name="l00862"></a><span class="lineno">  862</span> </div>
<div class="line"><a id="l00863" name="l00863"></a><span class="lineno">  863</span>  <span class="comment">/* That&#39;s it.  If m_user_request (we&#39;ve just nullified it) then async read chain will be finished forever as</span></div>
<div class="line"><a id="l00864" name="l00864"></a><span class="lineno">  864</span><span class="comment">   * soon as the user informs us of readability (if it ever does) -- we will detect there&#39;s an error</span></div>
<div class="line"><a id="l00865" name="l00865"></a><span class="lineno">  865</span><span class="comment">   * in m_pending_err_code already (and hence no m_user_request). */</span></div>
<div class="line"><a id="l00866" name="l00866"></a><span class="lineno">  866</span>} <span class="comment">// Blob_stream_mq_receiver_impl::on_ev_idle_timer_fired()</span></div>
<div class="line"><a id="l00867" name="l00867"></a><span class="lineno">  867</span> </div>
<div class="line"><a id="l00868" name="l00868"></a><span class="lineno">  868</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Persistent_mq_handle&gt;</div>
<div class="line"><a id="l00869" name="l00869"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ad98d5cf3970b4cef4932d59679c7d5b9">  869</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ad98d5cf3970b4cef4932d59679c7d5b9">Blob_stream_mq_receiver_impl&lt;Persistent_mq_handle&gt;::not_idle</a>()</div>
<div class="line"><a id="l00870" name="l00870"></a><span class="lineno">  870</span>{</div>
<div class="line"><a id="l00871" name="l00871"></a><span class="lineno">  871</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceipc_1_1util.html#ac66141280c3b7295a86b65209f31cc58">util::Fine_duration</a>;</div>
<div class="line"><a id="l00872" name="l00872"></a><span class="lineno">  872</span> </div>
<div class="line"><a id="l00873" name="l00873"></a><span class="lineno">  873</span>  <span class="keywordflow">if</span> (m_idle_timeout == Fine_duration::zero())</div>
<div class="line"><a id="l00874" name="l00874"></a><span class="lineno">  874</span>  {</div>
<div class="line"><a id="l00875" name="l00875"></a><span class="lineno">  875</span>    <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00876" name="l00876"></a><span class="lineno">  876</span>  }</div>
<div class="line"><a id="l00877" name="l00877"></a><span class="lineno">  877</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00878" name="l00878"></a><span class="lineno">  878</span> </div>
<div class="line"><a id="l00879" name="l00879"></a><span class="lineno">  879</span>  <span class="comment">/* idle_timer_run() has enabled the idle timer feature, and we&#39;ve been called indicating we just read something,</span></div>
<div class="line"><a id="l00880" name="l00880"></a><span class="lineno">  880</span><span class="comment">   * and therefore it is time to reschedule the idle timer. */</span></div>
<div class="line"><a id="l00881" name="l00881"></a><span class="lineno">  881</span> </div>
<div class="line"><a id="l00882" name="l00882"></a><span class="lineno">  882</span>  <span class="keyword">const</span> <span class="keyword">auto</span> n_canceled = m_idle_timer.expires_after(m_idle_timeout);</div>
<div class="line"><a id="l00883" name="l00883"></a><span class="lineno">  883</span> </div>
<div class="line"><a id="l00884" name="l00884"></a><span class="lineno">  884</span>  <span class="keywordflow">if</span> (n_canceled == 0)</div>
<div class="line"><a id="l00885" name="l00885"></a><span class="lineno">  885</span>  {</div>
<div class="line"><a id="l00886" name="l00886"></a><span class="lineno">  886</span>    <span class="comment">// This is a fun, rare coincidence that is worth an INFO message.</span></div>
<div class="line"><a id="l00887" name="l00887"></a><span class="lineno">  887</span>    FLOW_LOG_INFO(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Finished reading a message, which means &quot;</span></div>
<div class="line"><a id="l00888" name="l00888"></a><span class="lineno">  888</span>                  <span class="stringliteral">&quot;we just received traffic, which means the idle timer should be rescheduled.  However &quot;</span></div>
<div class="line"><a id="l00889" name="l00889"></a><span class="lineno">  889</span>                  <span class="stringliteral">&quot;when trying to reschedule it, we found we were too late: it was very recently queued to &quot;</span></div>
<div class="line"><a id="l00890" name="l00890"></a><span class="lineno">  890</span>                  <span class="stringliteral">&quot;be invoked in the near future.  An idle timeout error shall be emitted very soon.&quot;</span>);</div>
<div class="line"><a id="l00891" name="l00891"></a><span class="lineno">  891</span>  }</div>
<div class="line"><a id="l00892" name="l00892"></a><span class="lineno">  892</span>  <span class="keywordflow">else</span> <span class="comment">// if (n_canceled &gt;= 1)</span></div>
<div class="line"><a id="l00893" name="l00893"></a><span class="lineno">  893</span>  {</div>
<div class="line"><a id="l00894" name="l00894"></a><span class="lineno">  894</span>    assert((n_canceled == 1) &amp;&amp; <span class="stringliteral">&quot;We only issue 1 timer async_wait() at a time.&quot;</span>);</div>
<div class="line"><a id="l00895" name="l00895"></a><span class="lineno">  895</span> </div>
<div class="line"><a id="l00896" name="l00896"></a><span class="lineno">  896</span>    <span class="comment">/* m_timer_worker will m_idle_timer.async_wait(F), where F() will signal through pipe,</span></div>
<div class="line"><a id="l00897" name="l00897"></a><span class="lineno">  897</span><span class="comment">     * making *m_idle_timer_fired_peer readable.  We&#39;ve already used m_ev_wait_func() to start</span></div>
<div class="line"><a id="l00898" name="l00898"></a><span class="lineno">  898</span><span class="comment">     * wait on it being readable and invoke on_ev_idle_timer_fired() in that case; but we&#39;ve</span></div>
<div class="line"><a id="l00899" name="l00899"></a><span class="lineno">  899</span><span class="comment">     * canceled the previous .async_wait() that would make it readable; so just redo that part. */</span></div>
<div class="line"><a id="l00900" name="l00900"></a><span class="lineno">  900</span>    m_timer_worker.timer_async_wait(&amp;m_idle_timer, m_idle_timer_fired_peer);</div>
<div class="line"><a id="l00901" name="l00901"></a><span class="lineno">  901</span>  }</div>
<div class="line"><a id="l00902" name="l00902"></a><span class="lineno">  902</span>} <span class="comment">// Blob_stream_mq_receiver_impl::not_idle()</span></div>
<div class="line"><a id="l00903" name="l00903"></a><span class="lineno">  903</span> </div>
<div class="line"><a id="l00904" name="l00904"></a><span class="lineno">  904</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Persistent_mq_handle&gt;</div>
<div class="line"><a id="l00905" name="l00905"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a6c1e656d4ce90d13b4f2f38fa5ad5cf9">  905</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a6c1e656d4ce90d13b4f2f38fa5ad5cf9">Blob_stream_mq_receiver_impl&lt;Persistent_mq_handle&gt;::read_msg</a>(<a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a>* sync_err_code, <span class="keywordtype">size_t</span>* sync_sz)</div>
<div class="line"><a id="l00906" name="l00906"></a><span class="lineno">  906</span>{</div>
<div class="line"><a id="l00907" name="l00907"></a><span class="lineno">  907</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceipc_1_1util.html#a31e67d3a017477a04b313927e2f2c733">util::Task</a>;</div>
<div class="line"><a id="l00908" name="l00908"></a><span class="lineno">  908</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceipc_1_1util.html#a6cb62ae434900f3a8915b33ec5d61a96">util::Blob_mutable</a>;</div>
<div class="line"><a id="l00909" name="l00909"></a><span class="lineno">  909</span>  <span class="keyword">using </span>flow::util::Lock_guard;</div>
<div class="line"><a id="l00910" name="l00910"></a><span class="lineno">  910</span>  <span class="keyword">using </span>raw_ctl_cmd_enum_t = std::underlying_type_t&lt;Control_cmd&gt;;</div>
<div class="line"><a id="l00911" name="l00911"></a><span class="lineno">  911</span> </div>
<div class="line"><a id="l00912" name="l00912"></a><span class="lineno">  912</span>  assert(!m_pending_err_code);</div>
<div class="line"><a id="l00913" name="l00913"></a><span class="lineno">  913</span>  assert(m_user_request);</div>
<div class="line"><a id="l00914" name="l00914"></a><span class="lineno">  914</span> </div>
<div class="line"><a id="l00915" name="l00915"></a><span class="lineno">  915</span>  <span class="comment">/* We just entered possibly-not-would-block state of m_mq; and are about to nb-read message (which might would-block</span></div>
<div class="line"><a id="l00916" name="l00916"></a><span class="lineno">  916</span><span class="comment">   * and other possibilities).  Pre-condition is m_user_request is truthy -- has not been satisfied.  Lastly</span></div>
<div class="line"><a id="l00917" name="l00917"></a><span class="lineno">  917</span><span class="comment">   * m_control_state may be true or false depending on the last payload (if any).</span></div>
<div class="line"><a id="l00918" name="l00918"></a><span class="lineno">  918</span><span class="comment">   *</span></div>
<div class="line"><a id="l00919" name="l00919"></a><span class="lineno">  919</span><span class="comment">   *   -# MQ error or protocol error (invalid ctl msg) or graceful-close ctl msg =&gt; m_pending_err_code becomes true;</span></div>
<div class="line"><a id="l00920" name="l00920"></a><span class="lineno">  920</span><span class="comment">   *      emit to m_user_request; GTFO.</span></div>
<div class="line"><a id="l00921" name="l00921"></a><span class="lineno">  921</span><span class="comment">   *   -# Would-block =&gt; async-wait for readability, when ready read_msg() (us) again (unless</span></div>
<div class="line"><a id="l00922" name="l00922"></a><span class="lineno">  922</span><span class="comment">   *                     idle-timeout in the meantime, so be sure to not read_msg() in that case).  GTFO here</span></div>
<div class="line"><a id="l00923" name="l00923"></a><span class="lineno">  923</span><span class="comment">   *                     (algorithm continues asynchronously).</span></div>
<div class="line"><a id="l00924" name="l00924"></a><span class="lineno">  924</span><span class="comment">   *   -# Valid msg:</span></div>
<div class="line"><a id="l00925" name="l00925"></a><span class="lineno">  925</span><span class="comment">   *      -# If m_control_state already: So then it&#39;s PING =&gt; m_control_state=false; register non-idleness; go again*.</span></div>
<div class="line"><a id="l00926" name="l00926"></a><span class="lineno">  926</span><span class="comment">   *      -# Else:</span></div>
<div class="line"><a id="l00927" name="l00927"></a><span class="lineno">  927</span><span class="comment">   *         -# If empty msg =&gt; m_control_state=true; go again*.</span></div>
<div class="line"><a id="l00928" name="l00928"></a><span class="lineno">  928</span><span class="comment">   *         -# Else: regular user msg =&gt; emit to m_user_request; GTFO.</span></div>
<div class="line"><a id="l00929" name="l00929"></a><span class="lineno">  929</span><span class="comment">   *</span></div>
<div class="line"><a id="l00930" name="l00930"></a><span class="lineno">  930</span><span class="comment">   * (*) - What is &quot;go again&quot;?  It means repeat the above steps.  One way to structure this would be for read_msg()</span></div>
<div class="line"><a id="l00931" name="l00931"></a><span class="lineno">  931</span><span class="comment">   *       to then call read_msg().  That is algorithmically sound conceptually, but for example suppose there are</span></div>
<div class="line"><a id="l00932" name="l00932"></a><span class="lineno">  932</span><span class="comment">   *       100 PINGs queued up; we do not want 100+ stack frames.  So we avoid this recursion; instead it&#39;s a</span></div>
<div class="line"><a id="l00933" name="l00933"></a><span class="lineno">  933</span><span class="comment">   *       do-while loop, with the above steps being one iteration.</span></div>
<div class="line"><a id="l00934" name="l00934"></a><span class="lineno">  934</span><span class="comment">   *</span></div>
<div class="line"><a id="l00935" name="l00935"></a><span class="lineno">  935</span><span class="comment">   * Let us consider the possible outcomes of an iteration as listed above.</span></div>
<div class="line"><a id="l00936" name="l00936"></a><span class="lineno">  936</span><span class="comment">   *   -# m_pending_err_code truthy, emit-to-user, do not reiterate.</span></div>
<div class="line"><a id="l00937" name="l00937"></a><span class="lineno">  937</span><span class="comment">   *   -# m_pending_err_code falsy, emit-to-user, do not reiterate.</span></div>
<div class="line"><a id="l00938" name="l00938"></a><span class="lineno">  938</span><span class="comment">   *   -# Async-wait started, do not emit-to-user, do not reiterate.</span></div>
<div class="line"><a id="l00939" name="l00939"></a><span class="lineno">  939</span><span class="comment">   *   -# Reiterate.  (m_control_state would have changes to true or to false.)</span></div>
<div class="line"><a id="l00940" name="l00940"></a><span class="lineno">  940</span><span class="comment">   *</span></div>
<div class="line"><a id="l00941" name="l00941"></a><span class="lineno">  941</span><span class="comment">   * Here is how we structure the flow control then.  Firstly, outcome (3) stylistically we normally handle in various</span></div>
<div class="line"><a id="l00942" name="l00942"></a><span class="lineno">  942</span><span class="comment">   * places by `return`ing after starting async-wait.  It&#39;s nice visually to show that when the algorithm continues</span></div>
<div class="line"><a id="l00943" name="l00943"></a><span class="lineno">  943</span><span class="comment">   * asynchronously, then we don&#39;t do anything at the tail end (after the async-wait).  So, that&#39;s that for outcome (3).</span></div>
<div class="line"><a id="l00944" name="l00944"></a><span class="lineno">  944</span><span class="comment">   *</span></div>
<div class="line"><a id="l00945" name="l00945"></a><span class="lineno">  945</span><span class="comment">   * That leaves 2 possibilities if end of iteration is reached:</span></div>
<div class="line"><a id="l00946" name="l00946"></a><span class="lineno">  946</span><span class="comment">   *   - emit-to-user, stop loop;</span></div>
<div class="line"><a id="l00947" name="l00947"></a><span class="lineno">  947</span><span class="comment">   *   - do not emit-to-user, continue loop.</span></div>
<div class="line"><a id="l00948" name="l00948"></a><span class="lineno">  948</span><span class="comment">   *</span></div>
<div class="line"><a id="l00949" name="l00949"></a><span class="lineno">  949</span><span class="comment">   * Hence track it with `bool emit`; and end the do-while() once it becomes true.</span></div>
<div class="line"><a id="l00950" name="l00950"></a><span class="lineno">  950</span><span class="comment">   */</span></div>
<div class="line"><a id="l00951" name="l00951"></a><span class="lineno">  951</span>  <span class="keywordtype">bool</span> emit = <span class="keyword">false</span>;</div>
<div class="line"><a id="l00952" name="l00952"></a><span class="lineno">  952</span>  <a class="code hl_typedef" href="namespaceipc_1_1util.html#a6cb62ae434900f3a8915b33ec5d61a96">Blob_mutable</a> target_blob;</div>
<div class="line"><a id="l00953" name="l00953"></a><span class="lineno">  953</span> </div>
<div class="line"><a id="l00954" name="l00954"></a><span class="lineno">  954</span>  <span class="keywordflow">do</span></div>
<div class="line"><a id="l00955" name="l00955"></a><span class="lineno">  955</span>  {</div>
<div class="line"><a id="l00956" name="l00956"></a><span class="lineno">  956</span>    FLOW_LOG_TRACE(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Async-receive: Start of payload: &quot;</span></div>
<div class="line"><a id="l00957" name="l00957"></a><span class="lineno">  957</span>                   <span class="stringliteral">&quot;Either user message or CONTROL-state escape message; unless already in CONTROL state &quot;</span></div>
<div class="line"><a id="l00958" name="l00958"></a><span class="lineno">  958</span>                   <span class="stringliteral">&quot;(are we? = [&quot;</span> &lt;&lt; m_control_state &lt;&lt; <span class="stringliteral">&quot;]) -- then the CONTROL command enum value.&quot;</span>);</div>
<div class="line"><a id="l00959" name="l00959"></a><span class="lineno">  959</span> </div>
<div class="line"><a id="l00960" name="l00960"></a><span class="lineno">  960</span>    target_blob = m_control_state ? <a class="code hl_typedef" href="namespaceipc_1_1util.html#a6cb62ae434900f3a8915b33ec5d61a96">Blob_mutable</a>(m_target_control_blob.data(),</div>
<div class="line"><a id="l00961" name="l00961"></a><span class="lineno">  961</span>                                                 m_target_control_blob.size())</div>
<div class="line"><a id="l00962" name="l00962"></a><span class="lineno">  962</span>                                  : m_user_request-&gt;m_target_blob;</div>
<div class="line"><a id="l00963" name="l00963"></a><span class="lineno">  963</span> </div>
<div class="line"><a id="l00964" name="l00964"></a><span class="lineno">  964</span>    <span class="keyword">const</span> <span class="keywordtype">bool</span> rcvd_else_would_block_or_error</div>
<div class="line"><a id="l00965" name="l00965"></a><span class="lineno">  965</span>      = m_mq-&gt;try_receive(&amp;target_blob, &amp;m_pending_err_code);</div>
<div class="line"><a id="l00966" name="l00966"></a><span class="lineno">  966</span> </div>
<div class="line"><a id="l00967" name="l00967"></a><span class="lineno">  967</span>    <span class="keywordflow">if</span> (!m_pending_err_code)</div>
<div class="line"><a id="l00968" name="l00968"></a><span class="lineno">  968</span>    {</div>
<div class="line"><a id="l00969" name="l00969"></a><span class="lineno">  969</span>      <span class="keywordflow">if</span> (rcvd_else_would_block_or_error)</div>
<div class="line"><a id="l00970" name="l00970"></a><span class="lineno">  970</span>      {</div>
<div class="line"><a id="l00971" name="l00971"></a><span class="lineno">  971</span>        <span class="comment">// Not error, not would block: got low-level message.  Interpret it.</span></div>
<div class="line"><a id="l00972" name="l00972"></a><span class="lineno">  972</span> </div>
<div class="line"><a id="l00973" name="l00973"></a><span class="lineno">  973</span>        <span class="comment">/* Let&#39;s discuss protocol negotiation, as it applies to us.  Simply, the first thing we must receive</span></div>
<div class="line"><a id="l00974" name="l00974"></a><span class="lineno">  974</span><span class="comment">         * (though there&#39;s no requirement as to how soon it happens -- it just needs to precede anything else)</span></div>
<div class="line"><a id="l00975" name="l00975"></a><span class="lineno">  975</span><span class="comment">         * is a CONTROL message, whose payload (the 2nd MQ-message) contains a negative number (unlike regular</span></div>
<div class="line"><a id="l00976" name="l00976"></a><span class="lineno">  976</span><span class="comment">         * CONTROL messages, wherein it&#39;s a non-negative number encoding Control_cmd enum: 0, 1, ...), the</span></div>
<div class="line"><a id="l00977" name="l00977"></a><span class="lineno">  977</span><span class="comment">         * negation of which is the opposing side&#39;s preferred (highest supported) protocol version to pass-to</span></div>
<div class="line"><a id="l00978" name="l00978"></a><span class="lineno">  978</span><span class="comment">         * m_protocol_negotiator.compute_negotiated_proto_ver() -- which completes the negotiation.</span></div>
<div class="line"><a id="l00979" name="l00979"></a><span class="lineno">  979</span><span class="comment">         *</span></div>
<div class="line"><a id="l00980" name="l00980"></a><span class="lineno">  980</span><span class="comment">         * Since m_protocol_negotiator offers ability to track &quot;first message&quot; or &quot;not first message,&quot; we don&#39;t</span></div>
<div class="line"><a id="l00981" name="l00981"></a><span class="lineno">  981</span><span class="comment">         * need to keep our own m_ state about that.  Thus: */</span></div>
<div class="line"><a id="l00982" name="l00982"></a><span class="lineno">  982</span>        <span class="keywordtype">bool</span> proto_negotiating</div>
<div class="line"><a id="l00983" name="l00983"></a><span class="lineno">  983</span>          = m_protocol_negotiator.negotiated_proto_ver() == <a class="code hl_variable" href="classipc_1_1transport_1_1Protocol__negotiator.html#aa7e47f4f6a700aeaa9600a5426a17292">Protocol_negotiator::S_VER_UNKNOWN</a>;</div>
<div class="line"><a id="l00984" name="l00984"></a><span class="lineno">  984</span>        <span class="comment">/* If false, and we haven&#39;t errored-out of the loop, then negotiation is behind us.</span></div>
<div class="line"><a id="l00985" name="l00985"></a><span class="lineno">  985</span><span class="comment">         * If true, then in a couple places below we&#39;ll need to zealously handle the negotiation.</span></div>
<div class="line"><a id="l00986" name="l00986"></a><span class="lineno">  986</span><span class="comment">         * Generally speaking, the tactics we follow (when `true`) are consistent with Protocol_negotiator doc</span></div>
<div class="line"><a id="l00987" name="l00987"></a><span class="lineno">  987</span><span class="comment">         * header convention which mandates that we interpret as little as we can, until proto_negotiating</span></div>
<div class="line"><a id="l00988" name="l00988"></a><span class="lineno">  988</span><span class="comment">         * becomes true, or we error out due to negotiation fail. */</span></div>
<div class="line"><a id="l00989" name="l00989"></a><span class="lineno">  989</span> </div>
<div class="line"><a id="l00990" name="l00990"></a><span class="lineno">  990</span>        <span class="keywordflow">if</span> (m_control_state)</div>
<div class="line"><a id="l00991" name="l00991"></a><span class="lineno">  991</span>        {</div>
<div class="line"><a id="l00992" name="l00992"></a><span class="lineno">  992</span>          <span class="comment">// Do not forget!</span></div>
<div class="line"><a id="l00993" name="l00993"></a><span class="lineno">  993</span>          m_control_state = <span class="keyword">false</span>;</div>
<div class="line"><a id="l00994" name="l00994"></a><span class="lineno">  994</span> </div>
<div class="line"><a id="l00995" name="l00995"></a><span class="lineno">  995</span>          <span class="keywordflow">if</span> (target_blob.size() == <span class="keyword">sizeof</span>(<a class="code hl_enumeration" href="classipc_1_1transport_1_1Blob__stream__mq__base__impl.html#a2e46672d40fbf38cf6054edfad69e705">Control_cmd</a>))</div>
<div class="line"><a id="l00996" name="l00996"></a><span class="lineno">  996</span>          {</div>
<div class="line"><a id="l00997" name="l00997"></a><span class="lineno">  997</span>            <span class="keyword">const</span> <span class="keyword">auto</span>&amp; cmd = *(<span class="keyword">reinterpret_cast&lt;</span><span class="keyword">const </span><a class="code hl_enumeration" href="classipc_1_1transport_1_1Blob__stream__mq__base__impl.html#a2e46672d40fbf38cf6054edfad69e705">Control_cmd</a>*<span class="keyword">&gt;</span>(target_blob.data()));</div>
<div class="line"><a id="l00998" name="l00998"></a><span class="lineno">  998</span>            <span class="keyword">const</span> <span class="keyword">auto</span> raw_cmd = raw_ctl_cmd_enum_t(cmd);</div>
<div class="line"><a id="l00999" name="l00999"></a><span class="lineno">  999</span> </div>
<div class="line"><a id="l01000" name="l01000"></a><span class="lineno"> 1000</span>            <span class="keywordflow">if</span> (proto_negotiating)</div>
<div class="line"><a id="l01001" name="l01001"></a><span class="lineno"> 1001</span>            {</div>
<div class="line"><a id="l01002" name="l01002"></a><span class="lineno"> 1002</span>              <span class="comment">/* Protocol_negotiator handles everything (invalid value, incompatible range...); we just know</span></div>
<div class="line"><a id="l01003" name="l01003"></a><span class="lineno"> 1003</span><span class="comment">               * the encoding is to be the negation of the version. */</span></div>
<div class="line"><a id="l01004" name="l01004"></a><span class="lineno"> 1004</span><span class="preprocessor">#ifndef NDEBUG</span></div>
<div class="line"><a id="l01005" name="l01005"></a><span class="lineno"> 1005</span>              <span class="keyword">const</span> <span class="keywordtype">bool</span> ok =</div>
<div class="line"><a id="l01006" name="l01006"></a><span class="lineno"> 1006</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l01007" name="l01007"></a><span class="lineno"> 1007</span>              m_protocol_negotiator.compute_negotiated_proto_ver(-raw_cmd, &amp;m_pending_err_code);</div>
<div class="line"><a id="l01008" name="l01008"></a><span class="lineno"> 1008</span>              assert(ok &amp;&amp; <span class="stringliteral">&quot;Protocol_negotiator breaking contract?  Bug?&quot;</span>);</div>
<div class="line"><a id="l01009" name="l01009"></a><span class="lineno"> 1009</span>              proto_negotiating = <span class="keyword">false</span>; <span class="comment">// Just in case (maintainability).</span></div>
<div class="line"><a id="l01010" name="l01010"></a><span class="lineno"> 1010</span> </div>
<div class="line"><a id="l01011" name="l01011"></a><span class="lineno"> 1011</span>              <span class="comment">/* Cool, so now either all is cool, and we should keep reading; or m_pending_err_code contains how</span></div>
<div class="line"><a id="l01012" name="l01012"></a><span class="lineno"> 1012</span><span class="comment">               * negotiation failed, and loop will exit.  The general code before the } in `if (m_control) {}` will</span></div>
<div class="line"><a id="l01013" name="l01013"></a><span class="lineno"> 1013</span><span class="comment">               * handle it either way. */</span></div>
<div class="line"><a id="l01014" name="l01014"></a><span class="lineno"> 1014</span>            } <span class="comment">// if (proto_negotiating)</span></div>
<div class="line"><a id="l01015" name="l01015"></a><span class="lineno"> 1015</span>            <span class="keywordflow">else</span> <span class="keywordflow">if</span> (raw_cmd &gt;= raw_ctl_cmd_enum_t(Control_cmd::S_END_SENTINEL)) <span class="comment">// &amp;&amp; !proto_negotiating</span></div>
<div class="line"><a id="l01016" name="l01016"></a><span class="lineno"> 1016</span>            {</div>
<div class="line"><a id="l01017" name="l01017"></a><span class="lineno"> 1017</span>              FLOW_LOG_WARNING(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: In CONTROL state expecting encoding &quot;</span></div>
<div class="line"><a id="l01018" name="l01018"></a><span class="lineno"> 1018</span>                               <span class="stringliteral">&quot;enum value &lt; int[&quot;</span> &lt;&lt; raw_ctl_cmd_enum_t(Control_cmd::S_END_SENTINEL) &lt;&lt; <span class="stringliteral">&quot;] but got &quot;</span></div>
<div class="line"><a id="l01019" name="l01019"></a><span class="lineno"> 1019</span>                               <span class="stringliteral">&quot;[&quot;</span> &lt;&lt; raw_cmd &lt;&lt; <span class="stringliteral">&quot;]; emitting protocol error (bug on sender side?).&quot;</span>);</div>
<div class="line"><a id="l01020" name="l01020"></a><span class="lineno"> 1020</span>              m_pending_err_code = <a class="code hl_enumvalue" href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297a0ba1798bc135b43eebd7ce2481151348">error::Code::S_BLOB_STREAM_MQ_RECEIVER_BAD_CTL_CMD</a>;</div>
<div class="line"><a id="l01021" name="l01021"></a><span class="lineno"> 1021</span>            }</div>
<div class="line"><a id="l01022" name="l01022"></a><span class="lineno"> 1022</span>            <span class="keywordflow">else</span> <span class="comment">// if ((!proto_negotiating) &amp;&amp; (cmd is valid))</span></div>
<div class="line"><a id="l01023" name="l01023"></a><span class="lineno"> 1023</span>            {</div>
<div class="line"><a id="l01024" name="l01024"></a><span class="lineno"> 1024</span>              <span class="keywordflow">switch</span> (cmd)</div>
<div class="line"><a id="l01025" name="l01025"></a><span class="lineno"> 1025</span>              {</div>
<div class="line"><a id="l01026" name="l01026"></a><span class="lineno"> 1026</span>              <span class="keywordflow">case</span> Control_cmd::S_END_SENDING:</div>
<div class="line"><a id="l01027" name="l01027"></a><span class="lineno"> 1027</span>                m_pending_err_code = <a class="code hl_enumvalue" href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297aad44f87d53255ba573d57086dfeab805">error::Code::S_RECEIVES_FINISHED_CANNOT_RECEIVE</a>;</div>
<div class="line"><a id="l01028" name="l01028"></a><span class="lineno"> 1028</span>                <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l01029" name="l01029"></a><span class="lineno"> 1029</span>              <span class="keywordflow">case</span> Control_cmd::S_PING:</div>
<div class="line"><a id="l01030" name="l01030"></a><span class="lineno"> 1030</span>                <span class="comment">// As of this writing also INFO-level on sender side.   @todo Reconsider that and this too.</span></div>
<div class="line"><a id="l01031" name="l01031"></a><span class="lineno"> 1031</span>                FLOW_LOG_INFO(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: In CONTROL state got PING.  Ignoring &quot;</span></div>
<div class="line"><a id="l01032" name="l01032"></a><span class="lineno"> 1032</span>                              <span class="stringliteral">&quot;other than registering non-idle activity.  Back in non-CONTROL state.&quot;</span>);</div>
<div class="line"><a id="l01033" name="l01033"></a><span class="lineno"> 1033</span>                not_idle();</div>
<div class="line"><a id="l01034" name="l01034"></a><span class="lineno"> 1034</span> </div>
<div class="line"><a id="l01035" name="l01035"></a><span class="lineno"> 1035</span>                <span class="comment">// Like it said -- ignore it.  Just go for the next message.</span></div>
<div class="line"><a id="l01036" name="l01036"></a><span class="lineno"> 1036</span>                <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l01037" name="l01037"></a><span class="lineno"> 1037</span>              <span class="keywordflow">case</span> Control_cmd::S_END_SENTINEL:</div>
<div class="line"><a id="l01038" name="l01038"></a><span class="lineno"> 1038</span>                assert(<span class="keyword">false</span> &amp;&amp; <span class="stringliteral">&quot;Should&#39;ve been handled above already.&quot;</span>);</div>
<div class="line"><a id="l01039" name="l01039"></a><span class="lineno"> 1039</span>              } <span class="comment">// switch (cmd)</span></div>
<div class="line"><a id="l01040" name="l01040"></a><span class="lineno"> 1040</span>            } <span class="comment">// else if ((!proto_negotiating) &amp;&amp; (cmd is valid))</span></div>
<div class="line"><a id="l01041" name="l01041"></a><span class="lineno"> 1041</span>          } <span class="comment">// if (target_blob.size() == sizeof(Control_cmd))</span></div>
<div class="line"><a id="l01042" name="l01042"></a><span class="lineno"> 1042</span>          <span class="keywordflow">else</span> <span class="comment">// if (target_blob.size() != sizeof(Control_cmd))</span></div>
<div class="line"><a id="l01043" name="l01043"></a><span class="lineno"> 1043</span>          {</div>
<div class="line"><a id="l01044" name="l01044"></a><span class="lineno"> 1044</span>            FLOW_LOG_WARNING(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: In CONTROL state expecting msg of &quot;</span></div>
<div class="line"><a id="l01045" name="l01045"></a><span class="lineno"> 1045</span>                             <span class="stringliteral">&quot;exactly size [&quot;</span> &lt;&lt; <span class="keyword">sizeof</span>(<a class="code hl_enumeration" href="classipc_1_1transport_1_1Blob__stream__mq__base__impl.html#a2e46672d40fbf38cf6054edfad69e705">Control_cmd</a>) &lt;&lt; <span class="stringliteral">&quot;] &quot;</span></div>
<div class="line"><a id="l01046" name="l01046"></a><span class="lineno"> 1046</span>                             <span class="stringliteral">&quot;but got [&quot;</span> &lt;&lt; target_blob.size() &lt;&lt; <span class="stringliteral">&quot;]; emitting protocol error (bug on sender side?).&quot;</span>);</div>
<div class="line"><a id="l01047" name="l01047"></a><span class="lineno"> 1047</span>            m_pending_err_code = <a class="code hl_enumvalue" href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297a0ba1798bc135b43eebd7ce2481151348">error::Code::S_BLOB_STREAM_MQ_RECEIVER_BAD_CTL_CMD</a>;</div>
<div class="line"><a id="l01048" name="l01048"></a><span class="lineno"> 1048</span>          }</div>
<div class="line"><a id="l01049" name="l01049"></a><span class="lineno"> 1049</span> </div>
<div class="line"><a id="l01050" name="l01050"></a><span class="lineno"> 1050</span>          <span class="comment">// Close (graceful or error) =&gt; emit to user; end loop.  Ping =&gt; continue loop.</span></div>
<div class="line"><a id="l01051" name="l01051"></a><span class="lineno"> 1051</span>          assert(!emit);</div>
<div class="line"><a id="l01052" name="l01052"></a><span class="lineno"> 1052</span>          m_pending_err_code &amp;&amp; (emit = <span class="keyword">true</span>);</div>
<div class="line"><a id="l01053" name="l01053"></a><span class="lineno"> 1053</span>        } <span class="comment">// if (m_control_state)</span></div>
<div class="line"><a id="l01054" name="l01054"></a><span class="lineno"> 1054</span>        <span class="keywordflow">else</span> <span class="comment">// if (!m_control_state) // &amp;&amp; (rcvd_else_would_block_or_error) (so, got message, in non-CONTROL state)</span></div>
<div class="line"><a id="l01055" name="l01055"></a><span class="lineno"> 1055</span>        {</div>
<div class="line"><a id="l01056" name="l01056"></a><span class="lineno"> 1056</span>          assert(!emit);</div>
<div class="line"><a id="l01057" name="l01057"></a><span class="lineno"> 1057</span>          <span class="keywordflow">if</span> (target_blob.size() == 0)</div>
<div class="line"><a id="l01058" name="l01058"></a><span class="lineno"> 1058</span>          {</div>
<div class="line"><a id="l01059" name="l01059"></a><span class="lineno"> 1059</span>            FLOW_LOG_TRACE(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: In non-CONTROL state got escape message.  &quot;</span></div>
<div class="line"><a id="l01060" name="l01060"></a><span class="lineno"> 1060</span>                           <span class="stringliteral">&quot;Entering CONTROL state; reading again if possible.&quot;</span>);</div>
<div class="line"><a id="l01061" name="l01061"></a><span class="lineno"> 1061</span>            m_control_state = <span class="keyword">true</span>;</div>
<div class="line"><a id="l01062" name="l01062"></a><span class="lineno"> 1062</span> </div>
<div class="line"><a id="l01063" name="l01063"></a><span class="lineno"> 1063</span>            <span class="comment">/* if (proto_negotiating) { Good: In non-CONTROL state -- at start -- first message should do just this. }</span></div>
<div class="line"><a id="l01064" name="l01064"></a><span class="lineno"> 1064</span><span class="comment">             * else { Neither good nor bad; just apparently it&#39;s a CONTROL message coming next.  Err, good. } */</span></div>
<div class="line"><a id="l01065" name="l01065"></a><span class="lineno"> 1065</span>          }</div>
<div class="line"><a id="l01066" name="l01066"></a><span class="lineno"> 1066</span>          <span class="keywordflow">else</span> <span class="comment">// if (target_blob.size() != 0)</span></div>
<div class="line"><a id="l01067" name="l01067"></a><span class="lineno"> 1067</span>          {</div>
<div class="line"><a id="l01068" name="l01068"></a><span class="lineno"> 1068</span>            <span class="keywordflow">if</span> (proto_negotiating)</div>
<div class="line"><a id="l01069" name="l01069"></a><span class="lineno"> 1069</span>            {</div>
<div class="line"><a id="l01070" name="l01070"></a><span class="lineno"> 1070</span>              <span class="comment">/* In non-CONTROL state -- at start -- before protocol has been negotiated, the first message *must*</span></div>
<div class="line"><a id="l01071" name="l01071"></a><span class="lineno"> 1071</span><span class="comment">               * be a CONTROL message.  Formally speaking we&#39;ll never be able to parse the negotiated version, because</span></div>
<div class="line"><a id="l01072" name="l01072"></a><span class="lineno"> 1072</span><span class="comment">               * it is not coming first according to the protocol.  So, per it API, we can just give</span></div>
<div class="line"><a id="l01073" name="l01073"></a><span class="lineno"> 1073</span><span class="comment">               * Protocol_negotiator an invalid version, so it&#39;ll emit the proper error. */</span></div>
<div class="line"><a id="l01074" name="l01074"></a><span class="lineno"> 1074</span>              FLOW_LOG_WARNING(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: In non-CONTROL state got regular &quot;</span></div>
<div class="line"><a id="l01075" name="l01075"></a><span class="lineno"> 1075</span>                               <span class="stringliteral">&quot;user message.  However this is the start of the comm-pathway, and by protocol &quot;</span></div>
<div class="line"><a id="l01076" name="l01076"></a><span class="lineno"> 1076</span>                               <span class="stringliteral">&quot;the first thing must be a CONTROL message containing the protocol version; so &quot;</span></div>
<div class="line"><a id="l01077" name="l01077"></a><span class="lineno"> 1077</span>                               <span class="stringliteral">&quot;we shall now emit error accordingly.&quot;</span>);</div>
<div class="line"><a id="l01078" name="l01078"></a><span class="lineno"> 1078</span><span class="preprocessor">#ifndef NDEBUG</span></div>
<div class="line"><a id="l01079" name="l01079"></a><span class="lineno"> 1079</span>              <span class="keyword">const</span> <span class="keywordtype">bool</span> ok =</div>
<div class="line"><a id="l01080" name="l01080"></a><span class="lineno"> 1080</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l01081" name="l01081"></a><span class="lineno"> 1081</span>              m_protocol_negotiator.compute_negotiated_proto_ver(<a class="code hl_variable" href="classipc_1_1transport_1_1Protocol__negotiator.html#aa7e47f4f6a700aeaa9600a5426a17292">Protocol_negotiator::S_VER_UNKNOWN</a>,</div>
<div class="line"><a id="l01082" name="l01082"></a><span class="lineno"> 1082</span>                                                                 &amp;m_pending_err_code);</div>
<div class="line"><a id="l01083" name="l01083"></a><span class="lineno"> 1083</span>              assert(ok &amp;&amp; <span class="stringliteral">&quot;Protocol_negotiator breaking contract?  Bug?&quot;</span>);</div>
<div class="line"><a id="l01084" name="l01084"></a><span class="lineno"> 1084</span>              assert(m_pending_err_code</div>
<div class="line"><a id="l01085" name="l01085"></a><span class="lineno"> 1085</span>                     &amp;&amp; <span class="stringliteral">&quot;Protocol_negotiator should have emitted error given intentionally bad version.&quot;</span>);</div>
<div class="line"><a id="l01086" name="l01086"></a><span class="lineno"> 1086</span>              proto_negotiating = <span class="keyword">false</span>; <span class="comment">// Just in case (maintainability).</span></div>
<div class="line"><a id="l01087" name="l01087"></a><span class="lineno"> 1087</span>            }</div>
<div class="line"><a id="l01088" name="l01088"></a><span class="lineno"> 1088</span>            <span class="keywordflow">else</span> <span class="comment">// if (!proto_negotiating)</span></div>
<div class="line"><a id="l01089" name="l01089"></a><span class="lineno"> 1089</span>            {</div>
<div class="line"><a id="l01090" name="l01090"></a><span class="lineno"> 1090</span>              <span class="comment">// Regular user message in regular operation, post any negotiation.</span></div>
<div class="line"><a id="l01091" name="l01091"></a><span class="lineno"> 1091</span>              FLOW_LOG_TRACE(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: In non-CONTROL state got regular &quot;</span></div>
<div class="line"><a id="l01092" name="l01092"></a><span class="lineno"> 1092</span>                             <span class="stringliteral">&quot;user message.  Will emit to user (possibly via sync-args, namely if this is &quot;</span></div>
<div class="line"><a id="l01093" name="l01093"></a><span class="lineno"> 1093</span>                             <span class="stringliteral">&quot;synchronously within async-receive API).  Also registering non-idle activity.&quot;</span>);</div>
<div class="line"><a id="l01094" name="l01094"></a><span class="lineno"> 1094</span>              not_idle();</div>
<div class="line"><a id="l01095" name="l01095"></a><span class="lineno"> 1095</span>            }</div>
<div class="line"><a id="l01096" name="l01096"></a><span class="lineno"> 1096</span> </div>
<div class="line"><a id="l01097" name="l01097"></a><span class="lineno"> 1097</span>            <span class="comment">// Emit message (much more likely); or emit error.  Either way:</span></div>
<div class="line"><a id="l01098" name="l01098"></a><span class="lineno"> 1098</span>            emit = <span class="keyword">true</span>;</div>
<div class="line"><a id="l01099" name="l01099"></a><span class="lineno"> 1099</span>          }</div>
<div class="line"><a id="l01100" name="l01100"></a><span class="lineno"> 1100</span>        } <span class="comment">// else if (!m_control_state)</span></div>
<div class="line"><a id="l01101" name="l01101"></a><span class="lineno"> 1101</span>      } <span class="comment">// if (rcvd_else_would_block_or_error) (and !m_pending_err_code, but it may have become truthy inside)</span></div>
<div class="line"><a id="l01102" name="l01102"></a><span class="lineno"> 1102</span>      <span class="keywordflow">else</span> <span class="comment">// if (!rcvd_else_would_block_or_error) (and !m_pending_err_code, so in fact would-block)</span></div>
<div class="line"><a id="l01103" name="l01103"></a><span class="lineno"> 1103</span>      {</div>
<div class="line"><a id="l01104" name="l01104"></a><span class="lineno"> 1104</span>        FLOW_LOG_TRACE(<span class="stringliteral">&quot;Got would-block.  Awaiting readability.&quot;</span>);</div>
<div class="line"><a id="l01105" name="l01105"></a><span class="lineno"> 1105</span> </div>
<div class="line"><a id="l01106" name="l01106"></a><span class="lineno"> 1106</span>        <span class="comment">/* Conceptually we&#39;d like to do m_mq-&gt;async_wait(readable, F), where F() would perform</span></div>
<div class="line"><a id="l01107" name="l01107"></a><span class="lineno"> 1107</span><span class="comment">         * read_msg() (the present method: nb-receive over m_mq).  However this is the sync_io pattern, so</span></div>
<div class="line"><a id="l01108" name="l01108"></a><span class="lineno"> 1108</span><span class="comment">         * the user will be performing the conceptual async_wait() for us.  We must ask them to do so</span></div>
<div class="line"><a id="l01109" name="l01109"></a><span class="lineno"> 1109</span><span class="comment">         * via m_ev_wait_func(), giving them m_mq&#39;s FD -- m_ev_wait_hndl_mq -- to wait-on.  */</span></div>
<div class="line"><a id="l01110" name="l01110"></a><span class="lineno"> 1110</span> </div>
<div class="line"><a id="l01111" name="l01111"></a><span class="lineno"> 1111</span>        <span class="keywordflow">if</span> <span class="keyword">constexpr</span>(!Mq::S_HAS_NATIVE_HANDLE)</div>
<div class="line"><a id="l01112" name="l01112"></a><span class="lineno"> 1112</span>        {</div>
<div class="line"><a id="l01113" name="l01113"></a><span class="lineno"> 1113</span>          <span class="comment">/* In this case, though, m_mq has no FD; so we simulate it by awaiting readability in thread W</span></div>
<div class="line"><a id="l01114" name="l01114"></a><span class="lineno"> 1114</span><span class="comment">           * (which exists only for this purpose and is currently idle); and once that is detected we make the</span></div>
<div class="line"><a id="l01115" name="l01115"></a><span class="lineno"> 1115</span><span class="comment">           * pipe-read-end m_mq_ready_reader readable (by writing to write end):</span></div>
<div class="line"><a id="l01116" name="l01116"></a><span class="lineno"> 1116</span><span class="comment">           * *that* is watched by m_ev_wait_hndl_mq. */</span></div>
<div class="line"><a id="l01117" name="l01117"></a><span class="lineno"> 1117</span> </div>
<div class="line"><a id="l01118" name="l01118"></a><span class="lineno"> 1118</span>          <span class="comment">// So step 1 then; start the blocking wait in thread W.</span></div>
<div class="line"><a id="l01119" name="l01119"></a><span class="lineno"> 1119</span>          m_blocking_worker-&gt;post([<span class="keyword">this</span>]()</div>
<div class="line"><a id="l01120" name="l01120"></a><span class="lineno"> 1120</span>          {</div>
<div class="line"><a id="l01121" name="l01121"></a><span class="lineno"> 1121</span>            <span class="comment">// We are in thread W (the one and only code snippet that runs there).</span></div>
<div class="line"><a id="l01122" name="l01122"></a><span class="lineno"> 1122</span> </div>
<div class="line"><a id="l01123" name="l01123"></a><span class="lineno"> 1123</span>            <span class="comment">/* m_mq thread safety: See its doc header.  Spoiler alert: m_user_request not empty, so by posting</span></div>
<div class="line"><a id="l01124" name="l01124"></a><span class="lineno"> 1124</span><span class="comment">             * this onto thread W, thread U promises not to touch m_mq until *we* tell it to via m_ev_wait_hndl_mq.</span></div>
<div class="line"><a id="l01125" name="l01125"></a><span class="lineno"> 1125</span><span class="comment">             * async_receive_blob() will see m_user_request is non-empty and refuse to proceed.</span></div>
<div class="line"><a id="l01126" name="l01126"></a><span class="lineno"> 1126</span><span class="comment">             * The only other thing that would touch m_mq (outside of dtor&#39;s m_mq-&gt;interrupt_receives()) is the</span></div>
<div class="line"><a id="l01127" name="l01127"></a><span class="lineno"> 1127</span><span class="comment">             * async-wait-handler below -- but that will only run if *we* signal it to.  So it&#39;s safe.  (That spoiler</span></div>
<div class="line"><a id="l01128" name="l01128"></a><span class="lineno"> 1128</span><span class="comment">             * was very spoiler-y.  More of a restatement.) */</span></div>
<div class="line"><a id="l01129" name="l01129"></a><span class="lineno"> 1129</span> </div>
<div class="line"><a id="l01130" name="l01130"></a><span class="lineno"> 1130</span>            <a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a> err_code;</div>
<div class="line"><a id="l01131" name="l01131"></a><span class="lineno"> 1131</span>            m_mq-&gt;wait_receivable(&amp;err_code); <span class="comment">// This will TRACE-log plenty.</span></div>
<div class="line"><a id="l01132" name="l01132"></a><span class="lineno"> 1132</span>            <span class="keywordflow">if</span> (err_code == <a class="code hl_enumvalue" href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297a291f8a813c292ccdb475c345181653ac">error::Code::S_INTERRUPTED</a>)</div>
<div class="line"><a id="l01133" name="l01133"></a><span class="lineno"> 1133</span>            {</div>
<div class="line"><a id="l01134" name="l01134"></a><span class="lineno"> 1134</span>              FLOW_LOG_INFO(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Blocking-worker was awaiting MQ &quot;</span></div>
<div class="line"><a id="l01135" name="l01135"></a><span class="lineno"> 1135</span>                            <span class="stringliteral">&quot;transmissibility; interrupted (presumably by dtor).  Bailing out.&quot;</span>);</div>
<div class="line"><a id="l01136" name="l01136"></a><span class="lineno"> 1136</span>              <span class="keywordflow">return</span>; <span class="comment">// Dtor is shutting is down.  GTFO.</span></div>
<div class="line"><a id="l01137" name="l01137"></a><span class="lineno"> 1137</span>            }</div>
<div class="line"><a id="l01138" name="l01138"></a><span class="lineno"> 1138</span>            <span class="comment">// else</span></div>
<div class="line"><a id="l01139" name="l01139"></a><span class="lineno"> 1139</span> </div>
<div class="line"><a id="l01140" name="l01140"></a><span class="lineno"> 1140</span>            <span class="keywordflow">if</span> (err_code)</div>
<div class="line"><a id="l01141" name="l01141"></a><span class="lineno"> 1141</span>            {</div>
<div class="line"><a id="l01142" name="l01142"></a><span class="lineno"> 1142</span>              FLOW_LOG_WARNING(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Blocking-worker thread was awaiting MQ &quot;</span></div>
<div class="line"><a id="l01143" name="l01143"></a><span class="lineno"> 1143</span>                               <span class="stringliteral">&quot;transmissibility; yield error (not interrupted) -- details likely in WARNING above.  &quot;</span></div>
<div class="line"><a id="l01144" name="l01144"></a><span class="lineno"> 1144</span>                               <span class="stringliteral">&quot;We lack the means (well, the will mostly) to transmit the fact of the error &quot;</span></div>
<div class="line"><a id="l01145" name="l01145"></a><span class="lineno"> 1145</span>                               <span class="stringliteral">&quot;to user-land; so we will just report MQ-readability and let &quot;</span></div>
<div class="line"><a id="l01146" name="l01146"></a><span class="lineno"> 1146</span>                               <span class="stringliteral">&quot;user-land code uncover whatever is wrong with the MQ.  This is unusual generally.&quot;</span>);</div>
<div class="line"><a id="l01147" name="l01147"></a><span class="lineno"> 1147</span>            }</div>
<div class="line"><a id="l01148" name="l01148"></a><span class="lineno"> 1148</span>            <span class="comment">// else { No problem!  It logged enough; let us signal it. }</span></div>
<div class="line"><a id="l01149" name="l01149"></a><span class="lineno"> 1149</span>            FLOW_LOG_TRACE(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Blocking-worker thread was awaiting MQ &quot;</span></div>
<div class="line"><a id="l01150" name="l01150"></a><span class="lineno"> 1150</span>                           <span class="stringliteral">&quot;transmissibility; success; now pinging user-land via IPC-pipe.&quot;</span>);</div>
<div class="line"><a id="l01151" name="l01151"></a><span class="lineno"> 1151</span> </div>
<div class="line"><a id="l01152" name="l01152"></a><span class="lineno"> 1152</span>            <a class="code hl_function" href="namespaceipc_1_1util.html#a5429c6225cc9a271ad8c0041d99c236b">util::pipe_produce</a>(get_logger(), &amp;(*m_mq_ready_writer));</div>
<div class="line"><a id="l01153" name="l01153"></a><span class="lineno"> 1153</span>            <span class="comment">// m_mq_read_reader now has a byte to read!  m_ev_wait_hndl_mq will be event-active.</span></div>
<div class="line"><a id="l01154" name="l01154"></a><span class="lineno"> 1154</span>          }); <span class="comment">// m_blocking_worker-&gt;post()</span></div>
<div class="line"><a id="l01155" name="l01155"></a><span class="lineno"> 1155</span>        } <span class="comment">// if constexpr(!Mq::S_HAS_NATIVE_HANDLE)</span></div>
<div class="line"><a id="l01156" name="l01156"></a><span class="lineno"> 1156</span>        <span class="comment">// else if (Mq::S_HAS_NATIVE_HANDLE) { m_ev_wait_hndl_mq has the MQ&#39;s kernel-waitable handle!  Sw33t! }</span></div>
<div class="line"><a id="l01157" name="l01157"></a><span class="lineno"> 1157</span> </div>
<div class="line"><a id="l01158" name="l01158"></a><span class="lineno"> 1158</span>        m_ev_wait_func(&amp;m_ev_wait_hndl_mq,</div>
<div class="line"><a id="l01159" name="l01159"></a><span class="lineno"> 1159</span>                       <span class="keyword">false</span>, <span class="comment">// Wait for read (whether pipe or actual MQ!).</span></div>
<div class="line"><a id="l01160" name="l01160"></a><span class="lineno"> 1160</span>                       <span class="comment">// Once readable do this:</span></div>
<div class="line"><a id="l01161" name="l01161"></a><span class="lineno"> 1161</span>                       boost::make_shared&lt;Task&gt;</div>
<div class="line"><a id="l01162" name="l01162"></a><span class="lineno"> 1162</span>                         ([<span class="keyword">this</span>]()</div>
<div class="line"><a id="l01163" name="l01163"></a><span class="lineno"> 1163</span>        {</div>
<div class="line"><a id="l01164" name="l01164"></a><span class="lineno"> 1164</span>          <span class="comment">// We are back in *not* thread W!</span></div>
<div class="line"><a id="l01165" name="l01165"></a><span class="lineno"> 1165</span> </div>
<div class="line"><a id="l01166" name="l01166"></a><span class="lineno"> 1166</span>          <span class="keywordflow">if</span> <span class="keyword">constexpr</span>(!Mq::S_HAS_NATIVE_HANDLE)</div>
<div class="line"><a id="l01167" name="l01167"></a><span class="lineno"> 1167</span>          {</div>
<div class="line"><a id="l01168" name="l01168"></a><span class="lineno"> 1168</span>            <a class="code hl_function" href="namespaceipc_1_1util.html#a814272e555c0592b0caf92b7bc3d64b3">util::pipe_consume</a>(get_logger(), &amp;(*m_mq_ready_reader)); <span class="comment">// Consume the byte to get to steady-state.</span></div>
<div class="line"><a id="l01169" name="l01169"></a><span class="lineno"> 1169</span>          }</div>
<div class="line"><a id="l01170" name="l01170"></a><span class="lineno"> 1170</span>          <span class="comment">// else { No byte was written.  In fact there&#39;s no pipe even. }</span></div>
<div class="line"><a id="l01171" name="l01171"></a><span class="lineno"> 1171</span> </div>
<div class="line"><a id="l01172" name="l01172"></a><span class="lineno"> 1172</span>          FLOW_LOG_TRACE(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: User-performed wait-for-readable finished &quot;</span></div>
<div class="line"><a id="l01173" name="l01173"></a><span class="lineno"> 1173</span>                         <span class="stringliteral">&quot;(readable or error, we do not know which yet).  We endeavour to receive-&gt;pop-&gt;receive-&gt;... &quot;</span></div>
<div class="line"><a id="l01174" name="l01174"></a><span class="lineno"> 1174</span>                         <span class="stringliteral">&quot;as much of the MQ as we can until would-block, or we have a full message (so either &quot;</span></div>
<div class="line"><a id="l01175" name="l01175"></a><span class="lineno"> 1175</span>                         <span class="stringliteral">&quot;1 message, or if in CONTROL state then 2 messages).&quot;</span>);</div>
<div class="line"><a id="l01176" name="l01176"></a><span class="lineno"> 1176</span>          <span class="keywordflow">if</span> (m_pending_err_code)</div>
<div class="line"><a id="l01177" name="l01177"></a><span class="lineno"> 1177</span>          {</div>
<div class="line"><a id="l01178" name="l01178"></a><span class="lineno"> 1178</span>            FLOW_LOG_TRACE(<span class="stringliteral">&quot;However error (presumably idle-timeout) occurred in the meantime; &quot;</span></div>
<div class="line"><a id="l01179" name="l01179"></a><span class="lineno"> 1179</span>                           <span class="stringliteral">&quot;hence stopping read-chain forever.&quot;</span>);</div>
<div class="line"><a id="l01180" name="l01180"></a><span class="lineno"> 1180</span> </div>
<div class="line"><a id="l01181" name="l01181"></a><span class="lineno"> 1181</span>            assert((!m_user_request) <span class="comment">// Sanity-check.</span></div>
<div class="line"><a id="l01182" name="l01182"></a><span class="lineno"> 1182</span>                   &amp;&amp; <span class="stringliteral">&quot;If rcv-error emitted during low-level async-wait, we should have fed it to any &quot;</span></div>
<div class="line"><a id="l01183" name="l01183"></a><span class="lineno"> 1183</span>                        <span class="stringliteral">&quot;pending async-receive.&quot;</span>);</div>
<div class="line"><a id="l01184" name="l01184"></a><span class="lineno"> 1184</span>            <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l01185" name="l01185"></a><span class="lineno"> 1185</span>          }</div>
<div class="line"><a id="l01186" name="l01186"></a><span class="lineno"> 1186</span>          <span class="comment">// else if (!m_pending_err_code)</span></div>
<div class="line"><a id="l01187" name="l01187"></a><span class="lineno"> 1187</span>          assert(m_user_request &amp;&amp; <span class="stringliteral">&quot;Only an error, or we ourselves here, can satisfy user request.&quot;</span>); <span class="comment">// Sanity check.</span></div>
<div class="line"><a id="l01188" name="l01188"></a><span class="lineno"> 1188</span> </div>
<div class="line"><a id="l01189" name="l01189"></a><span class="lineno"> 1189</span>          <span class="comment">// Will potentially emit these (if and only if message-read completes due to this successful async-wait).</span></div>
<div class="line"><a id="l01190" name="l01190"></a><span class="lineno"> 1190</span>          <a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a> sync_err_code;</div>
<div class="line"><a id="l01191" name="l01191"></a><span class="lineno"> 1191</span>          <span class="keywordtype">size_t</span> sync_sz;</div>
<div class="line"><a id="l01192" name="l01192"></a><span class="lineno"> 1192</span> </div>
<div class="line"><a id="l01193" name="l01193"></a><span class="lineno"> 1193</span>          <span class="comment">// Would-not-block, as far as we know.  Try again.</span></div>
<div class="line"><a id="l01194" name="l01194"></a><span class="lineno"> 1194</span>          read_msg(&amp;sync_err_code, &amp;sync_sz);</div>
<div class="line"><a id="l01195" name="l01195"></a><span class="lineno"> 1195</span> </div>
<div class="line"><a id="l01196" name="l01196"></a><span class="lineno"> 1196</span>          <span class="keywordflow">if</span> (sync_err_code == <a class="code hl_enumvalue" href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297aa667487757f9d6300f6888bac40bcc24">error::Code::S_SYNC_IO_WOULD_BLOCK</a>)</div>
<div class="line"><a id="l01197" name="l01197"></a><span class="lineno"> 1197</span>          {</div>
<div class="line"><a id="l01198" name="l01198"></a><span class="lineno"> 1198</span>            <span class="comment">// Another async-wait is pending now.  We&#39;ve logged enough.  Live to fight another day.</span></div>
<div class="line"><a id="l01199" name="l01199"></a><span class="lineno"> 1199</span>            <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l01200" name="l01200"></a><span class="lineno"> 1200</span>          }</div>
<div class="line"><a id="l01201" name="l01201"></a><span class="lineno"> 1201</span>          <span class="comment">// else: Message completed/error!</span></div>
<div class="line"><a id="l01202" name="l01202"></a><span class="lineno"> 1202</span> </div>
<div class="line"><a id="l01203" name="l01203"></a><span class="lineno"> 1203</span>          FLOW_LOG_TRACE(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Async-op result ready after successful &quot;</span></div>
<div class="line"><a id="l01204" name="l01204"></a><span class="lineno"> 1204</span>                         <span class="stringliteral">&quot;async-wait.  Executing handler now.&quot;</span>);</div>
<div class="line"><a id="l01205" name="l01205"></a><span class="lineno"> 1205</span> </div>
<div class="line"><a id="l01206" name="l01206"></a><span class="lineno"> 1206</span>          <span class="comment">// Prevent stepping on our own toes: move/clear it first / invoke handler second.</span></div>
<div class="line"><a id="l01207" name="l01207"></a><span class="lineno"> 1207</span>          <span class="keyword">const</span> <span class="keyword">auto</span> on_done_func = std::move(m_user_request-&gt;m_on_done_func);</div>
<div class="line"><a id="l01208" name="l01208"></a><span class="lineno"> 1208</span>          m_user_request.reset();</div>
<div class="line"><a id="l01209" name="l01209"></a><span class="lineno"> 1209</span>          on_done_func(sync_err_code, sync_sz);</div>
<div class="line"><a id="l01210" name="l01210"></a><span class="lineno"> 1210</span>          FLOW_LOG_TRACE(<span class="stringliteral">&quot;Blob_stream_mq_receiver [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Handler completed.&quot;</span>);</div>
<div class="line"><a id="l01211" name="l01211"></a><span class="lineno"> 1211</span>        })); <span class="comment">// m_ev_wait_func(): on_active_ev_func arg</span></div>
<div class="line"><a id="l01212" name="l01212"></a><span class="lineno"> 1212</span> </div>
<div class="line"><a id="l01213" name="l01213"></a><span class="lineno"> 1213</span>        *sync_err_code = <a class="code hl_enumvalue" href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297aa667487757f9d6300f6888bac40bcc24">error::Code::S_SYNC_IO_WOULD_BLOCK</a>;</div>
<div class="line"><a id="l01214" name="l01214"></a><span class="lineno"> 1214</span>        *sync_sz = 0;</div>
<div class="line"><a id="l01215" name="l01215"></a><span class="lineno"> 1215</span>        <span class="keywordflow">return</span>; <span class="comment">// Async read chain started/continuing.  GTFO.</span></div>
<div class="line"><a id="l01216" name="l01216"></a><span class="lineno"> 1216</span>      } <span class="comment">// else if (!rcvd_else_would_block_or_error) (and !m_pending_err_code, so in fact would-block)</span></div>
<div class="line"><a id="l01217" name="l01217"></a><span class="lineno"> 1217</span>    } <span class="comment">// if (!m_pending_err_code) [from m_mq-&gt;try_receive()] (but it may have become truthy inside)</span></div>
<div class="line"><a id="l01218" name="l01218"></a><span class="lineno"> 1218</span>    <span class="keywordflow">else</span> <span class="comment">// if (m_pending_err_code) [from m_mq-&gt;try_receive()]</span></div>
<div class="line"><a id="l01219" name="l01219"></a><span class="lineno"> 1219</span>    {</div>
<div class="line"><a id="l01220" name="l01220"></a><span class="lineno"> 1220</span>      assert(!emit);</div>
<div class="line"><a id="l01221" name="l01221"></a><span class="lineno"> 1221</span>      emit = <span class="keyword">true</span>; <span class="comment">// Error =&gt; emit to user, end loop.  The try_*() WARNING+TRACE-logged enough.</span></div>
<div class="line"><a id="l01222" name="l01222"></a><span class="lineno"> 1222</span>    }</div>
<div class="line"><a id="l01223" name="l01223"></a><span class="lineno"> 1223</span>  }</div>
<div class="line"><a id="l01224" name="l01224"></a><span class="lineno"> 1224</span>  <span class="keywordflow">while</span> (!emit);</div>
<div class="line"><a id="l01225" name="l01225"></a><span class="lineno"> 1225</span> </div>
<div class="line"><a id="l01226" name="l01226"></a><span class="lineno"> 1226</span>  <span class="comment">// Passed the gauntlet.  Emit whatever happened to user.</span></div>
<div class="line"><a id="l01227" name="l01227"></a><span class="lineno"> 1227</span> </div>
<div class="line"><a id="l01228" name="l01228"></a><span class="lineno"> 1228</span>  assert(m_pending_err_code || <span class="comment">// Sanity-check: Either error/closed, or we got a nice non-empty message.</span></div>
<div class="line"><a id="l01229" name="l01229"></a><span class="lineno"> 1229</span>         ((!m_control_state) &amp;&amp; (target_blob.size() != 0)));</div>
<div class="line"><a id="l01230" name="l01230"></a><span class="lineno"> 1230</span> </div>
<div class="line"><a id="l01231" name="l01231"></a><span class="lineno"> 1231</span>  *sync_err_code = m_pending_err_code;</div>
<div class="line"><a id="l01232" name="l01232"></a><span class="lineno"> 1232</span>  *sync_sz = m_pending_err_code ? 0 : target_blob.size();</div>
<div class="line"><a id="l01233" name="l01233"></a><span class="lineno"> 1233</span>} <span class="comment">// Blob_stream_mq_receiver_impl::read_msg()</span></div>
<div class="line"><a id="l01234" name="l01234"></a><span class="lineno"> 1234</span> </div>
<div class="line"><a id="l01235" name="l01235"></a><span class="lineno"> 1235</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Persistent_mq_handle&gt;</div>
<div class="line"><a id="l01236" name="l01236"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a8df5929fc0f3413079df8e2be08bf972"> 1236</a></span><span class="keywordtype">size_t</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a8df5929fc0f3413079df8e2be08bf972">Blob_stream_mq_receiver_impl&lt;Persistent_mq_handle&gt;::receive_blob_max_size</a>()<span class="keyword"> const</span></div>
<div class="line"><a id="l01237" name="l01237"></a><span class="lineno"> 1237</span><span class="keyword"></span>{</div>
<div class="line"><a id="l01238" name="l01238"></a><span class="lineno"> 1238</span>  <span class="keywordflow">return</span> m_mq_max_msg_sz; <span class="comment">// As promised in concept API: never changes in PEER state.</span></div>
<div class="line"><a id="l01239" name="l01239"></a><span class="lineno"> 1239</span>}</div>
<div class="line"><a id="l01240" name="l01240"></a><span class="lineno"> 1240</span> </div>
<div class="line"><a id="l01241" name="l01241"></a><span class="lineno"> 1241</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Persistent_mq_handle&gt;</div>
<div class="line"><a id="l01242" name="l01242"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#acf5dd76c0d00746137fe6adedfa4c26d"> 1242</a></span><span class="keyword">const</span> <a class="code hl_class" href="classipc_1_1util_1_1Shared__name.html">Shared_name</a>&amp; <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#acf5dd76c0d00746137fe6adedfa4c26d">Blob_stream_mq_receiver_impl&lt;Persistent_mq_handle&gt;::absolute_name</a>()<span class="keyword"> const</span></div>
<div class="line"><a id="l01243" name="l01243"></a><span class="lineno"> 1243</span><span class="keyword"></span>{</div>
<div class="line"><a id="l01244" name="l01244"></a><span class="lineno"> 1244</span>  <span class="keywordflow">return</span> m_absolute_name;</div>
<div class="line"><a id="l01245" name="l01245"></a><span class="lineno"> 1245</span>}</div>
<div class="line"><a id="l01246" name="l01246"></a><span class="lineno"> 1246</span> </div>
<div class="line"><a id="l01247" name="l01247"></a><span class="lineno"> 1247</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Persistent_mq_handle&gt;</div>
<div class="line"><a id="l01248" name="l01248"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#adaf3579ec3abf0b5d85258965d264660"> 1248</a></span><span class="keyword">const</span> std::string&amp; <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#adaf3579ec3abf0b5d85258965d264660">Blob_stream_mq_receiver_impl&lt;Persistent_mq_handle&gt;::nickname</a>()<span class="keyword"> const</span></div>
<div class="line"><a id="l01249" name="l01249"></a><span class="lineno"> 1249</span><span class="keyword"></span>{</div>
<div class="line"><a id="l01250" name="l01250"></a><span class="lineno"> 1250</span>  <span class="keywordflow">return</span> m_nickname;</div>
<div class="line"><a id="l01251" name="l01251"></a><span class="lineno"> 1251</span>}</div>
<div class="line"><a id="l01252" name="l01252"></a><span class="lineno"> 1252</span> </div>
<div class="line"><a id="l01253" name="l01253"></a><span class="lineno"> 1253</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Persistent_mq_handle&gt;</div>
<div class="line"><a id="l01254" name="l01254"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a4efecbe0fe86aa7d61b86f9c5edf20b4"> 1254</a></span>std::ostream&amp; <a class="code hl_function" href="namespaceipc_1_1transport_1_1sync__io.html#acd90efe9d59793c62bc89da75f74030d">operator&lt;&lt;</a>(std::ostream&amp; os, <span class="keyword">const</span> <a class="code hl_class" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html">Blob_stream_mq_receiver_impl&lt;Persistent_mq_handle&gt;</a>&amp; val)</div>
<div class="line"><a id="l01255" name="l01255"></a><span class="lineno"> 1255</span>{</div>
<div class="line"><a id="l01256" name="l01256"></a><span class="lineno"> 1256</span>  <span class="comment">/* Tempting to just print val.m_mq and all those goodies, which include val.absolute_name() too among others,</span></div>
<div class="line"><a id="l01257" name="l01257"></a><span class="lineno"> 1257</span><span class="comment">   * as opposed to sh_name[] only; however m_mq might get hosed during this call and become null; a lock would be</span></div>
<div class="line"><a id="l01258" name="l01258"></a><span class="lineno"> 1258</span><span class="comment">   * required; not worth it. */</span></div>
<div class="line"><a id="l01259" name="l01259"></a><span class="lineno"> 1259</span>  <span class="keywordflow">return</span></div>
<div class="line"><a id="l01260" name="l01260"></a><span class="lineno"> 1260</span>    os &lt;&lt; <span class="stringliteral">&quot;SIO[&quot;</span></div>
<div class="line"><a id="l01261" name="l01261"></a><span class="lineno"> 1261</span>       &lt;&lt; val.<a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#adaf3579ec3abf0b5d85258965d264660">nickname</a>() &lt;&lt; <span class="stringliteral">&quot;]@&quot;</span> &lt;&lt; <span class="keyword">static_cast&lt;</span><span class="keyword">const </span><span class="keywordtype">void</span>*<span class="keyword">&gt;</span>(&amp;val) &lt;&lt; <span class="stringliteral">&quot; sh_name[&quot;</span> &lt;&lt; val.<a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#acf5dd76c0d00746137fe6adedfa4c26d">absolute_name</a>() &lt;&lt; <span class="charliteral">&#39;]&#39;</span>;</div>
<div class="line"><a id="l01262" name="l01262"></a><span class="lineno"> 1262</span>}</div>
<div class="line"><a id="l01263" name="l01263"></a><span class="lineno"> 1263</span> </div>
<div class="line"><a id="l01264" name="l01264"></a><span class="lineno"> 1264</span>} <span class="comment">// namespace ipc::transport::sync_io</span></div>
<div class="ttc" id="ablob__stream__mq__impl_8hpp_html"><div class="ttname"><a href="blob__stream__mq__impl_8hpp.html">blob_stream_mq_impl.hpp</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1Blob__stream__mq__base__impl_html"><div class="ttname"><a href="classipc_1_1transport_1_1Blob__stream__mq__base__impl.html">ipc::transport::Blob_stream_mq_base_impl</a></div><div class="ttdoc">Internal implementation of Blob_stream_mq_base class template; and common utilities used by Blob_stre...</div><div class="ttdef"><b>Definition:</b> <a href="blob__stream__mq__impl_8hpp_source.html#l00042">blob_stream_mq_impl.hpp:43</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1Blob__stream__mq__base__impl_html_a2e46672d40fbf38cf6054edfad69e705"><div class="ttname"><a href="classipc_1_1transport_1_1Blob__stream__mq__base__impl.html#a2e46672d40fbf38cf6054edfad69e705">ipc::transport::Blob_stream_mq_base_impl::Control_cmd</a></div><div class="ttdeci">Control_cmd</div><div class="ttdoc">If Blob_stream_mq_sender_impl sends an empty message, in NORMAL state Blob_stream_mq_receiver enters ...</div><div class="ttdef"><b>Definition:</b> <a href="blob__stream__mq__impl_8hpp_source.html#l00131">blob_stream_mq_impl.hpp:132</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1Blob__stream__mq__base__impl_html_a4776b5f569ccac03eccb3fc2f360fcc9"><div class="ttname"><a href="classipc_1_1transport_1_1Blob__stream__mq__base__impl.html#a4776b5f569ccac03eccb3fc2f360fcc9">ipc::transport::Blob_stream_mq_base_impl::ensure_unique_peer</a></div><div class="ttdeci">static Auto_closing_mq ensure_unique_peer(flow::log::Logger *logger_ptr, Mq &amp;&amp;mq, bool snd_else_rcv, Error_code *err_code)</div><div class="ttdoc">Internal helper for Blob_stream_mq_sender and Blob_stream_mq_receiver that operates both the start an...</div><div class="ttdef"><b>Definition:</b> <a href="blob__stream__mq__impl_8hpp_source.html#l00219">blob_stream_mq_impl.hpp:219</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1Blob__stream__mq__base__impl_html_a8fac0ed5fff23aa42e0a601db6fee42d"><div class="ttname"><a href="classipc_1_1transport_1_1Blob__stream__mq__base__impl.html#a8fac0ed5fff23aa42e0a601db6fee42d">ipc::transport::Blob_stream_mq_base_impl::Mq</a></div><div class="ttdeci">Persistent_mq_handle Mq</div><div class="ttdoc">Short-hand for template arg for underlying MQ handle type.</div><div class="ttdef"><b>Definition:</b> <a href="blob__stream__mq__impl_8hpp_source.html#l00048">blob_stream_mq_impl.hpp:48</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1Blob__stream__mq__base__impl_html_aab7c4c91d42c746c93e61eb367572eb1"><div class="ttname"><a href="classipc_1_1transport_1_1Blob__stream__mq__base__impl.html#aab7c4c91d42c746c93e61eb367572eb1">ipc::transport::Blob_stream_mq_base_impl::Auto_closing_mq</a></div><div class="ttdeci">boost::movelib::unique_ptr&lt; Mq, Function&lt; void(Mq *)&gt; &gt; Auto_closing_mq</div><div class="ttdoc">Persistent_mq_handle holder that takes a deleter lambda on construction, intended here to perform add...</div><div class="ttdef"><b>Definition:</b> <a href="blob__stream__mq__impl_8hpp_source.html#l00054">blob_stream_mq_impl.hpp:54</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1Persistent__mq__handle_html"><div class="ttname"><a href="classipc_1_1transport_1_1Persistent__mq__handle.html">ipc::transport::Persistent_mq_handle</a></div><div class="ttdoc">A documentation-only concept defining the behavior of an object representing a light-weight handle to...</div><div class="ttdef"><b>Definition:</b> <a href="persistent__mq__handle_8hpp_source.html#l00194">persistent_mq_handle.hpp:195</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1Protocol__negotiator_html"><div class="ttname"><a href="classipc_1_1transport_1_1Protocol__negotiator.html">ipc::transport::Protocol_negotiator</a></div><div class="ttdoc">A simple state machine that, assuming the opposide side of a comm pathway uses an equivalent state ma...</div><div class="ttdef"><b>Definition:</b> <a href="protocol__negotiator_8hpp_source.html#l00189">protocol_negotiator.hpp:191</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1Protocol__negotiator_html_aa7e47f4f6a700aeaa9600a5426a17292"><div class="ttname"><a href="classipc_1_1transport_1_1Protocol__negotiator.html#aa7e47f4f6a700aeaa9600a5426a17292">ipc::transport::Protocol_negotiator::S_VER_UNKNOWN</a></div><div class="ttdeci">static constexpr proto_ver_t S_VER_UNKNOWN</div><div class="ttdoc">A proto_ver_t value, namely a negative one, which is a reserved value indicating &quot;unknown version&quot;; i...</div><div class="ttdef"><b>Definition:</b> <a href="protocol__negotiator_8hpp_source.html#l00215">protocol_negotiator.hpp:215</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html">ipc::transport::sync_io::Blob_stream_mq_receiver_impl</a></div><div class="ttdoc">Internal, non-movable pImpl-lite implementation of sync_io::Blob_stream_mq_receiver class template.</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00071">blob_stream_mq_rcv_impl.hpp:75</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_a013d5b8cd991e0ba9d2e26a0f532fed8"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a013d5b8cd991e0ba9d2e26a0f532fed8">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::op_started</a></div><div class="ttdeci">bool op_started(util::String_view context) const</div><div class="ttdoc">Helper that returns true silently if start_*_ops() has been called; else logs WARNING and returns fal...</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00652">blob_stream_mq_rcv_impl.hpp:652</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_a0511a6453387e65378f0e66d80886bcd"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a0511a6453387e65378f0e66d80886bcd">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::m_ev_wait_hndl_idle_timer_fired_peer</a></div><div class="ttdeci">util::sync_io::Asio_waitable_native_handle m_ev_wait_hndl_idle_timer_fired_peer</div><div class="ttdoc">Descriptor waitable by outside event loop async-waits – storing the same Native_handle as (and thus b...</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00442">blob_stream_mq_rcv_impl.hpp:442</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_a08712e065d9a6778a0bb18de94009f22"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a08712e065d9a6778a0bb18de94009f22">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::~Blob_stream_mq_receiver_impl</a></div><div class="ttdeci">~Blob_stream_mq_receiver_impl()</div><div class="ttdoc">See Blob_stream_mq_receiver counterpart.</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00575">blob_stream_mq_rcv_impl.hpp:575</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_a1c8ac9998df02ead0180c6bc00bc58dd"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a1c8ac9998df02ead0180c6bc00bc58dd">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::m_ev_wait_func</a></div><div class="ttdeci">util::sync_io::Event_wait_func m_ev_wait_func</div><div class="ttdoc">Function (set forever in start_receive_blob_ops()) through which we invoke the outside event loop's a...</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00449">blob_stream_mq_rcv_impl.hpp:449</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_a1e286f452b6e3a74d64e1f795795afe2"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a1e286f452b6e3a74d64e1f795795afe2">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::start_receive_blob_ops</a></div><div class="ttdeci">bool start_receive_blob_ops(util::sync_io::Event_wait_func &amp;&amp;ev_wait_func)</div><div class="ttdoc">See Blob_stream_mq_receiver counterpart.</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00634">blob_stream_mq_rcv_impl.hpp:635</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_a25ec1b85b46e3b9ad9a4fe59bc158f45"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a25ec1b85b46e3b9ad9a4fe59bc158f45">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::m_mq_max_msg_sz</a></div><div class="ttdeci">const size_t m_mq_max_msg_sz</div><div class="ttdoc">Equals m_mq.max_msg_size().</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00319">blob_stream_mq_rcv_impl.hpp:319</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_a276f39d3d52038a341bf2ec86b4640ef"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a276f39d3d52038a341bf2ec86b4640ef">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::m_control_state</a></div><div class="ttdeci">bool m_control_state</div><div class="ttdoc">At steady-state false, becomes true if a low-level &quot;escape&quot; payload (empty message) was last received...</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00385">blob_stream_mq_rcv_impl.hpp:385</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_a370d5984484667dae6fd227e7ef0d4ff"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a370d5984484667dae6fd227e7ef0d4ff">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::m_idle_timeout</a></div><div class="ttdeci">util::Fine_duration m_idle_timeout</div><div class="ttdoc">timeout from idle_timer_run() args; or zero() if not yet called.</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00414">blob_stream_mq_rcv_impl.hpp:414</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_a3e1c13dc986985621ab05de16f9e811c"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a3e1c13dc986985621ab05de16f9e811c">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::Blob_stream_mq_receiver_impl</a></div><div class="ttdeci">Blob_stream_mq_receiver_impl(flow::log::Logger *logger_ptr, util::String_view nickname_str, Mq &amp;&amp;mq_moved, Error_code *err_code)</div><div class="ttdoc">See Blob_stream_mq_receiver counterpart.</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00476">blob_stream_mq_rcv_impl.hpp:477</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_a3ee71a39a443e78c86f82652d8d0601e"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a3ee71a39a443e78c86f82652d8d0601e">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::replace_event_wait_handles</a></div><div class="ttdeci">bool replace_event_wait_handles(const Create_ev_wait_hndl_func &amp;create_ev_wait_hndl_func)</div><div class="ttdoc">See Blob_stream_mq_receiver counterpart.</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00594">blob_stream_mq_rcv_impl.hpp:595</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_a415d72c8ed4bed42fc84bf46f716742a"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a415d72c8ed4bed42fc84bf46f716742a">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::m_pending_err_code</a></div><div class="ttdeci">Error_code m_pending_err_code</div><div class="ttdoc">The first and only MQ-hosing error condition detected when attempting to low-level-read on m_mq; or f...</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00408">blob_stream_mq_rcv_impl.hpp:408</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_a5c46890c19e4fe69d9276647205af786"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a5c46890c19e4fe69d9276647205af786">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::on_ev_idle_timer_fired</a></div><div class="ttdeci">void on_ev_idle_timer_fired()</div><div class="ttdoc">Handler for the async-wait, via util::sync_io::Timer_event_emitter, of the idle timer firing; if stil...</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00834">blob_stream_mq_rcv_impl.hpp:834</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_a64d71115e8212c896eb7baa82f005c82"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a64d71115e8212c896eb7baa82f005c82">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::m_idle_timer_fired_peer</a></div><div class="ttdeci">util::sync_io::Timer_event_emitter::Timer_fired_read_end * m_idle_timer_fired_peer</div><div class="ttdoc">Read-end of IPC-mechanism used by m_timer_worker to ferry timer-fired events from m_idle_timer to syn...</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00434">blob_stream_mq_rcv_impl.hpp:434</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_a6c1e656d4ce90d13b4f2f38fa5ad5cf9"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a6c1e656d4ce90d13b4f2f38fa5ad5cf9">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::read_msg</a></div><div class="ttdeci">void read_msg(Error_code *sync_err_code, size_t *sync_sz)</div><div class="ttdoc">Begins read chain (completing it as synchronously as possible, async-completing the rest) for the nex...</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00905">blob_stream_mq_rcv_impl.hpp:905</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_a7f3ac613026a5c7704641ba5b3971fe5"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a7f3ac613026a5c7704641ba5b3971fe5">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::m_idle_timer</a></div><div class="ttdeci">flow::util::Timer m_idle_timer</div><div class="ttdoc">Timer that fires on_ev_idle_timer_fired() (which hoses the pipe with idle timeour error) and is (re)s...</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00426">blob_stream_mq_rcv_impl.hpp:426</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_a819d349f5cafcba88f3dff63968d74b0"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a819d349f5cafcba88f3dff63968d74b0">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::m_user_request</a></div><div class="ttdeci">std::optional&lt; User_request &gt; m_user_request</div><div class="ttdoc">Null if no async_receive_blob()` is currently pending; else describes the arguments to that pending a...</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00378">blob_stream_mq_rcv_impl.hpp:378</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_a878fa03873bcdea5aa9d938a4791325f"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a878fa03873bcdea5aa9d938a4791325f">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::idle_timer_run</a></div><div class="ttdeci">bool idle_timer_run(util::Fine_duration timeout)</div><div class="ttdoc">See Blob_stream_mq_receiver counterpart, but assuming PEER state.</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00777">blob_stream_mq_rcv_impl.hpp:777</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_a87df1a6c9a98542a8fb00a9d85570c64"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a87df1a6c9a98542a8fb00a9d85570c64">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::m_ev_wait_hndl_mq</a></div><div class="ttdeci">util::sync_io::Asio_waitable_native_handle m_ev_wait_hndl_mq</div><div class="ttdoc">Descriptor waitable by outside event loop async-waits – storing the same Native_handle as (and thus b...</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00353">blob_stream_mq_rcv_impl.hpp:353</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_a8d1a81d379e1a31031adb9cccbbabd35"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a8d1a81d379e1a31031adb9cccbbabd35">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::async_receive_blob</a></div><div class="ttdeci">bool async_receive_blob(const util::Blob_mutable &amp;target_blob, Error_code *sync_err_code, size_t *sync_sz, Task_err_sz &amp;&amp;on_done_func)</div><div class="ttdoc">See Blob_stream_mq_receiver counterpart, but assuming PEER state.</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00667">blob_stream_mq_rcv_impl.hpp:668</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_a8df5929fc0f3413079df8e2be08bf972"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a8df5929fc0f3413079df8e2be08bf972">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::receive_blob_max_size</a></div><div class="ttdeci">size_t receive_blob_max_size() const</div><div class="ttdoc">See Blob_stream_mq_receiver counterpart, but assuming PEER state.</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l01236">blob_stream_mq_rcv_impl.hpp:1236</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_a9f1120b92ea20944b2de416d870644ce"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#a9f1120b92ea20944b2de416d870644ce">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::m_nb_task_engine</a></div><div class="ttdeci">std::optional&lt; flow::util::Task_engine &gt; m_nb_task_engine</div><div class="ttdoc">The Task_engine for m_mq_ready_*.</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00278">blob_stream_mq_rcv_impl.hpp:278</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_aa3b1062b158606ea1760a3952b978e73"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#aa3b1062b158606ea1760a3952b978e73">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::m_ev_hndl_task_engine_unused</a></div><div class="ttdeci">flow::util::Task_engine m_ev_hndl_task_engine_unused</div><div class="ttdoc">The Task_engine for m_ev_wait_hndl_*, unless it is replaced via replace_event_wait_handles().</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00292">blob_stream_mq_rcv_impl.hpp:292</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_aae2ee292cd7b9742b32e68dfd84d8361"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#aae2ee292cd7b9742b32e68dfd84d8361">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::m_timer_worker</a></div><div class="ttdeci">util::sync_io::Timer_event_emitter m_timer_worker</div><div class="ttdoc">As typical in timer-needing sync_io-pattern-implementing objects, maintains a thread exclusively for ...</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00362">blob_stream_mq_rcv_impl.hpp:362</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_ac181b33a0b5cdb0e89753b62d86af50f"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ac181b33a0b5cdb0e89753b62d86af50f">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::m_mq_ready_writer</a></div><div class="ttdeci">std::optional&lt; util::Pipe_writer &gt; m_mq_ready_writer</div><div class="ttdoc">Write-end of IPC-pipe used by thread W to inform thread U that a thread-W transmissibility-wait has c...</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00342">blob_stream_mq_rcv_impl.hpp:342</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_ac892341e6a1fcc6ef8739bce8403fb6d"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ac892341e6a1fcc6ef8739bce8403fb6d">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::m_nickname</a></div><div class="ttdeci">const std::string m_nickname</div><div class="ttdoc">See nickname().</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00249">blob_stream_mq_rcv_impl.hpp:249</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_acf5dd76c0d00746137fe6adedfa4c26d"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#acf5dd76c0d00746137fe6adedfa4c26d">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::absolute_name</a></div><div class="ttdeci">const Shared_name &amp; absolute_name() const</div><div class="ttdoc">See Blob_stream_mq_receiver counterpart, but assuming PEER state.</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l01242">blob_stream_mq_rcv_impl.hpp:1242</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_ad233c7b57cbb817fb243bec5d338ec2e"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ad233c7b57cbb817fb243bec5d338ec2e">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::m_blocking_worker</a></div><div class="ttdeci">std::optional&lt; flow::async::Single_thread_task_loop &gt; m_blocking_worker</div><div class="ttdoc">Worker thread W always in one of 2 states: idle; or (when m_mq is in would-block condition) executing...</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00468">blob_stream_mq_rcv_impl.hpp:468</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_ad98d5cf3970b4cef4932d59679c7d5b9"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ad98d5cf3970b4cef4932d59679c7d5b9">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::not_idle</a></div><div class="ttdeci">void not_idle()</div><div class="ttdoc">No-ops if idle_timer_run() is not engaged; otherwise reacts to non-idleness of the in-pipe by resched...</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00869">blob_stream_mq_rcv_impl.hpp:869</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_adaf3579ec3abf0b5d85258965d264660"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#adaf3579ec3abf0b5d85258965d264660">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::nickname</a></div><div class="ttdeci">const std::string &amp; nickname() const</div><div class="ttdoc">See Blob_stream_mq_receiver counterpart, but assuming PEER state.</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l01248">blob_stream_mq_rcv_impl.hpp:1248</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_add6affc3ee78f02c3a48a10115ec82ea"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#add6affc3ee78f02c3a48a10115ec82ea">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::m_absolute_name</a></div><div class="ttdeci">const Shared_name m_absolute_name</div><div class="ttdoc">See absolute_name().</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00261">blob_stream_mq_rcv_impl.hpp:261</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_ae71fa0a5594915910b0b8dd88743f62e"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#ae71fa0a5594915910b0b8dd88743f62e">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::m_mq</a></div><div class="ttdeci">Base::Auto_closing_mq m_mq</div><div class="ttdoc">The MQ handle adopted by the ctor, through which nb-receives and blocking-waits are executed.</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00311">blob_stream_mq_rcv_impl.hpp:311</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_aeec08979b985498aa0738892c947a8a9"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#aeec08979b985498aa0738892c947a8a9">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::m_protocol_negotiator</a></div><div class="ttdeci">Protocol_negotiator m_protocol_negotiator</div><div class="ttdoc">Handles the protocol negotiation at the start of the pipe and subsequently stores the result of that ...</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00258">blob_stream_mq_rcv_impl.hpp:258</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_af308d3f1ff50138070c8422552f069a5"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#af308d3f1ff50138070c8422552f069a5">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::m_target_control_blob</a></div><div class="ttdeci">flow::util::Blob m_target_control_blob</div><div class="ttdoc">Used only when m_control_state is true, this is where payload 2 (the Control_cmd) is placed.</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00400">blob_stream_mq_rcv_impl.hpp:400</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_html_af742578435fde1d0c536196698ddbc75"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl.html#af742578435fde1d0c536196698ddbc75">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::m_mq_ready_reader</a></div><div class="ttdeci">std::optional&lt; util::Pipe_reader &gt; m_mq_ready_reader</div><div class="ttdoc">Read-end of IPC-pipe used by thread U to detect that a thread-W transmissibility-wait has completed,...</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00331">blob_stream_mq_rcv_impl.hpp:331</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver_html"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver.html">ipc::transport::sync_io::Blob_stream_mq_receiver</a></div><div class="ttdoc">Implements sync_io::Blob_receiver concept by using an adopted Persistent_mq_handle MQ handle to an MQ...</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2blob__stream__mq__rcv_8hpp_source.html#l00073">blob_stream_mq_rcv.hpp:74</a></div></div>
<div class="ttc" id="aclassipc_1_1util_1_1Shared__name_html"><div class="ttname"><a href="classipc_1_1util_1_1Shared__name.html">ipc::util::Shared_name</a></div><div class="ttdoc">String-wrapping abstraction representing a name uniquely distinguishing a kernel-persistent entity fr...</div><div class="ttdef"><b>Definition:</b> <a href="shared__name_8hpp_source.html#l00241">shared_name.hpp:242</a></div></div>
<div class="ttc" id="aclassipc_1_1util_1_1sync__io_1_1Asio__waitable__native__handle_html"><div class="ttname"><a href="classipc_1_1util_1_1sync__io_1_1Asio__waitable__native__handle.html">ipc::util::sync_io::Asio_waitable_native_handle</a></div><div class="ttdoc">Useful if using the sync_io pattern within a user event loop built on boost.asio (optionally with flo...</div><div class="ttdef"><b>Definition:</b> <a href="asio__waitable__native__hndl_8hpp_source.html#l00080">asio_waitable_native_hndl.hpp:81</a></div></div>
<div class="ttc" id="aclassipc_1_1util_1_1sync__io_1_1Asio__waitable__native__handle_html_a7d28277f9ef090032b0483c65f79f23c"><div class="ttname"><a href="classipc_1_1util_1_1sync__io_1_1Asio__waitable__native__handle.html#a7d28277f9ef090032b0483c65f79f23c">ipc::util::sync_io::Asio_waitable_native_handle::assign</a></div><div class="ttdeci">void assign(Native_handle hndl)</div><div class="ttdoc">Loads value to be returned by native_handle().</div><div class="ttdef"><b>Definition:</b> <a href="asio__waitable__native__hndl_8cpp_source.html#l00065">asio_waitable_native_hndl.cpp:65</a></div></div>
<div class="ttc" id="aclassipc_1_1util_1_1sync__io_1_1Timer__event__emitter_html"><div class="ttname"><a href="classipc_1_1util_1_1sync__io_1_1Timer__event__emitter.html">ipc::util::sync_io::Timer_event_emitter</a></div><div class="ttdoc">An object of this type, used internally to implement sync_io-pattern objects that require timer event...</div><div class="ttdef"><b>Definition:</b> <a href="timer__ev__emitter_8hpp_source.html#l00145">timer_ev_emitter.hpp:148</a></div></div>
<div class="ttc" id="aclassipc_1_1util_1_1sync__io_1_1Timer__event__emitter_html_a1533a54927a64579fda02c61ec94b735"><div class="ttname"><a href="classipc_1_1util_1_1sync__io_1_1Timer__event__emitter.html#a1533a54927a64579fda02c61ec94b735">ipc::util::sync_io::Timer_event_emitter::Timer_fired_read_end</a></div><div class="ttdeci">boost::asio::readable_pipe Timer_fired_read_end</div><div class="ttdoc">Object representing the read end of IPC mechanism, where readable status indicates the associated tim...</div><div class="ttdef"><b>Definition:</b> <a href="timer__ev__emitter_8hpp_source.html#l00162">timer_ev_emitter.hpp:162</a></div></div>
<div class="ttc" id="anamespaceipc_1_1transport_1_1error_html_adfef15ef4e76cc55d652fbd9c2797297a0ba1798bc135b43eebd7ce2481151348"><div class="ttname"><a href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297a0ba1798bc135b43eebd7ce2481151348">ipc::transport::error::Code::S_BLOB_STREAM_MQ_RECEIVER_BAD_CTL_CMD</a></div><div class="ttdeci">@ S_BLOB_STREAM_MQ_RECEIVER_BAD_CTL_CMD</div><div class="ttdoc">Message-queue blob stream peer received a malformed internal-use message from opposing side.</div></div>
<div class="ttc" id="anamespaceipc_1_1transport_1_1error_html_adfef15ef4e76cc55d652fbd9c2797297a291f8a813c292ccdb475c345181653ac"><div class="ttname"><a href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297a291f8a813c292ccdb475c345181653ac">ipc::transport::error::Code::S_INTERRUPTED</a></div><div class="ttdeci">@ S_INTERRUPTED</div><div class="ttdoc">A blocking operation was intentionally interrupted or preemptively canceled.</div></div>
<div class="ttc" id="anamespaceipc_1_1transport_1_1error_html_adfef15ef4e76cc55d652fbd9c2797297aa667487757f9d6300f6888bac40bcc24"><div class="ttname"><a href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297aa667487757f9d6300f6888bac40bcc24">ipc::transport::error::Code::S_SYNC_IO_WOULD_BLOCK</a></div><div class="ttdeci">@ S_SYNC_IO_WOULD_BLOCK</div><div class="ttdoc">A sync_io operation could not immediately complete; it will complete contingent on active async-wait ...</div></div>
<div class="ttc" id="anamespaceipc_1_1transport_1_1error_html_adfef15ef4e76cc55d652fbd9c2797297aad44f87d53255ba573d57086dfeab805"><div class="ttname"><a href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297aad44f87d53255ba573d57086dfeab805">ipc::transport::error::Code::S_RECEIVES_FINISHED_CANNOT_RECEIVE</a></div><div class="ttdeci">@ S_RECEIVES_FINISHED_CANNOT_RECEIVE</div><div class="ttdoc">Will not receive message: either opposing user sent graceful-close via API.</div></div>
<div class="ttc" id="anamespaceipc_1_1transport_1_1error_html_adfef15ef4e76cc55d652fbd9c2797297aba920b52e9801e4927dd346ad83ce815"><div class="ttname"><a href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297aba920b52e9801e4927dd346ad83ce815">ipc::transport::error::Code::S_RECEIVER_IDLE_TIMEOUT</a></div><div class="ttdeci">@ S_RECEIVER_IDLE_TIMEOUT</div><div class="ttdoc">No messages (optional auto-pings or otherwise) have been received; optionally configured timeout exce...</div></div>
<div class="ttc" id="anamespaceipc_1_1transport_1_1error_html_adfef15ef4e76cc55d652fbd9c2797297ac416e988563e44bf15fc6a81743eef53"><div class="ttname"><a href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297ac416e988563e44bf15fc6a81743eef53">ipc::transport::error::Code::S_INVALID_ARGUMENT</a></div><div class="ttdeci">@ S_INVALID_ARGUMENT</div><div class="ttdoc">User called an API with 1 or more arguments against the API spec.</div></div>
<div class="ttc" id="anamespaceipc_1_1transport_1_1sync__io_html"><div class="ttname"><a href="namespaceipc_1_1transport_1_1sync__io.html">ipc::transport::sync_io</a></div><div class="ttdoc">sync_io-pattern counterparts to async-I/O-pattern object types in parent namespace ipc::transport.</div><div class="ttdef"><b>Definition:</b> <a href="detail_2transport__fwd_8hpp_source.html#l00069">transport_fwd.hpp:70</a></div></div>
<div class="ttc" id="anamespaceipc_1_1transport_1_1sync__io_html_acd90efe9d59793c62bc89da75f74030d"><div class="ttname"><a href="namespaceipc_1_1transport_1_1sync__io.html#acd90efe9d59793c62bc89da75f74030d">ipc::transport::sync_io::operator&lt;&lt;</a></div><div class="ttdeci">std::ostream &amp; operator&lt;&lt;(std::ostream &amp;os, const Blob_stream_mq_receiver_impl&lt; Persistent_mq_handle &gt; &amp;val)</div><div class="ttdoc">Prints string representation of the given Blob_stream_mq_receiver_impl to the given ostream.</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l01254">blob_stream_mq_rcv_impl.hpp:1254</a></div></div>
<div class="ttc" id="anamespaceipc_1_1transport_html_a7ee4551983d9df16ec16a3139bac50e8"><div class="ttname"><a href="namespaceipc_1_1transport.html#a7ee4551983d9df16ec16a3139bac50e8">ipc::transport::Native_handle</a></div><div class="ttdeci">util::Native_handle Native_handle</div><div class="ttdoc">Convenience alias for the commonly used type util::Native_handle.</div><div class="ttdef"><b>Definition:</b> <a href="transport__fwd_8hpp_source.html#l00081">transport_fwd.hpp:81</a></div></div>
<div class="ttc" id="anamespaceipc_1_1util_1_1sync__io_html_aa0b9a3cc6bdc7dedbef4f9e06851aa24"><div class="ttname"><a href="namespaceipc_1_1util_1_1sync__io.html#aa0b9a3cc6bdc7dedbef4f9e06851aa24">ipc::util::sync_io::Event_wait_func</a></div><div class="ttdeci">Function&lt; void(Asio_waitable_native_handle *hndl_of_interest, bool ev_of_interest_snd_else_rcv, Task_ptr &amp;&amp;on_active_ev_func)&gt; Event_wait_func</div><div class="ttdoc">In sync_io pattern, concrete type storing user-supplied function invoked by pattern-implementing ipc:...</div><div class="ttdef"><b>Definition:</b> <a href="sync__io__fwd_8hpp_source.html#l00798">sync_io_fwd.hpp:800</a></div></div>
<div class="ttc" id="anamespaceipc_1_1util_html_a31e67d3a017477a04b313927e2f2c733"><div class="ttname"><a href="namespaceipc_1_1util.html#a31e67d3a017477a04b313927e2f2c733">ipc::util::Task</a></div><div class="ttdeci">flow::async::Task Task</div><div class="ttdoc">Short-hand for polymorphic function (a-la std::function&lt;&gt;) that takes no arguments and returns nothin...</div><div class="ttdef"><b>Definition:</b> <a href="util__fwd_8hpp_source.html#l00122">util_fwd.hpp:122</a></div></div>
<div class="ttc" id="anamespaceipc_1_1util_html_a5429c6225cc9a271ad8c0041d99c236b"><div class="ttname"><a href="namespaceipc_1_1util.html#a5429c6225cc9a271ad8c0041d99c236b">ipc::util::pipe_produce</a></div><div class="ttdeci">void pipe_produce(flow::log::Logger *logger_ptr, Pipe_writer *pipe)</div><div class="ttdoc">Writes a byte to the given pipe writer.</div><div class="ttdef"><b>Definition:</b> <a href="ipc__core_2src_2ipc_2util_2detail_2util_8cpp_source.html#l00067">util.cpp:67</a></div></div>
<div class="ttc" id="anamespaceipc_1_1util_html_a6cb62ae434900f3a8915b33ec5d61a96"><div class="ttname"><a href="namespaceipc_1_1util.html#a6cb62ae434900f3a8915b33ec5d61a96">ipc::util::Blob_mutable</a></div><div class="ttdeci">boost::asio::mutable_buffer Blob_mutable</div><div class="ttdoc">Short-hand for an mutable blob somewhere in memory, stored as exactly a void* and a size_t.</div><div class="ttdef"><b>Definition:</b> <a href="util__fwd_8hpp_source.html#l00140">util_fwd.hpp:140</a></div></div>
<div class="ttc" id="anamespaceipc_1_1util_html_a814272e555c0592b0caf92b7bc3d64b3"><div class="ttname"><a href="namespaceipc_1_1util.html#a814272e555c0592b0caf92b7bc3d64b3">ipc::util::pipe_consume</a></div><div class="ttdeci">void pipe_consume(flow::log::Logger *logger_ptr, Pipe_reader *pipe)</div><div class="ttdoc">Reads a byte via the given pipe reader.</div><div class="ttdef"><b>Definition:</b> <a href="ipc__core_2src_2ipc_2util_2detail_2util_8cpp_source.html#l00096">util.cpp:96</a></div></div>
<div class="ttc" id="anamespaceipc_1_1util_html_ac66141280c3b7295a86b65209f31cc58"><div class="ttname"><a href="namespaceipc_1_1util.html#ac66141280c3b7295a86b65209f31cc58">ipc::util::Fine_duration</a></div><div class="ttdeci">flow::Fine_duration Fine_duration</div><div class="ttdoc">Short-hand for Flow's Fine_duration.</div><div class="ttdef"><b>Definition:</b> <a href="util__fwd_8hpp_source.html#l00117">util_fwd.hpp:117</a></div></div>
<div class="ttc" id="anamespaceipc_1_1util_html_ae6ac47812a90d1287c61e0b7de7bc4f5"><div class="ttname"><a href="namespaceipc_1_1util.html#ae6ac47812a90d1287c61e0b7de7bc4f5">ipc::util::String_view</a></div><div class="ttdeci">flow::util::String_view String_view</div><div class="ttdoc">Short-hand for Flow's String_view.</div><div class="ttdef"><b>Definition:</b> <a href="util__fwd_8hpp_source.html#l00115">util_fwd.hpp:115</a></div></div>
<div class="ttc" id="anamespaceipc_html_a4ccdeed058222c635745a4dc830e99f7"><div class="ttname"><a href="namespaceipc.html#a4ccdeed058222c635745a4dc830e99f7">ipc::Log_component</a></div><div class="ttdeci">Log_component</div><div class="ttdoc">The flow::log::Component payload enumeration containing various log components used by Flow-IPC inter...</div><div class="ttdef"><b>Definition:</b> <a href="common_8hpp_source.html#l00322">common.hpp:323</a></div></div>
<div class="ttc" id="anamespaceipc_html_aa3192e586cc45d3e7c22463bf2760f89"><div class="ttname"><a href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">ipc::Error_code</a></div><div class="ttdeci">flow::Error_code Error_code</div><div class="ttdoc">Short-hand for flow::Error_code which is very common.</div><div class="ttdef"><b>Definition:</b> <a href="common_8hpp_source.html#l00298">common.hpp:298</a></div></div>
<div class="ttc" id="aprotocol__negotiator_8hpp_html"><div class="ttname"><a href="protocol__negotiator_8hpp.html">protocol_negotiator.hpp</a></div></div>
<div class="ttc" id="astructipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_1_1User__request_html"><div class="ttname"><a href="structipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_1_1User__request.html">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::User_request</a></div><div class="ttdoc">Identical to sync_io::Async_adapter_receiver::User_request, except we only keep at most 1 of these an...</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00183">blob_stream_mq_rcv_impl.hpp:184</a></div></div>
<div class="ttc" id="astructipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_1_1User__request_html_a8da903f9c107dd546991e8b9843190e6"><div class="ttname"><a href="structipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_1_1User__request.html#a8da903f9c107dd546991e8b9843190e6">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::User_request::m_on_done_func</a></div><div class="ttdeci">flow::async::Task_asio_err_sz m_on_done_func</div><div class="ttdoc">Same as in sync_io::Async_adapter_receiver::User_request.</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00190">blob_stream_mq_rcv_impl.hpp:190</a></div></div>
<div class="ttc" id="astructipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_1_1User__request_html_aabc02495e840cdd6fe0e5bfa31b33509"><div class="ttname"><a href="structipc_1_1transport_1_1sync__io_1_1Blob__stream__mq__receiver__impl_1_1User__request.html#aabc02495e840cdd6fe0e5bfa31b33509">ipc::transport::sync_io::Blob_stream_mq_receiver_impl::User_request::m_target_blob</a></div><div class="ttdeci">util::Blob_mutable m_target_blob</div><div class="ttdoc">Same as in sync_io::Async_adapter_receiver::User_request.</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2blob__stream__mq__rcv__impl_8hpp_source.html#l00188">blob_stream_mq_rcv_impl.hpp:188</a></div></div>
<div class="ttc" id="astructipc_1_1util_1_1Native__handle_html"><div class="ttname"><a href="structipc_1_1util_1_1Native__handle.html">ipc::util::Native_handle</a></div><div class="ttdoc">A monolayer-thin wrapper around a native handle, a/k/a descriptor a/k/a FD.</div><div class="ttdef"><b>Definition:</b> <a href="native__handle_8hpp_source.html#l00062">native_handle.hpp:63</a></div></div>
<div class="ttc" id="astructipc_1_1util_1_1Native__handle_html_ab2f496740139c5752a25a30cf3325d86"><div class="ttname"><a href="structipc_1_1util_1_1Native__handle.html#ab2f496740139c5752a25a30cf3325d86">ipc::util::Native_handle::m_native_handle</a></div><div class="ttdeci">handle_t m_native_handle</div><div class="ttdoc">The native handle (possibly equal to S_NULL_HANDLE), the exact payload of this Native_handle.</div><div class="ttdef"><b>Definition:</b> <a href="native__handle_8hpp_source.html#l00085">native_handle.hpp:85</a></div></div>
<div class="ttc" id="async__io__fwd_8hpp_html"><div class="ttname"><a href="sync__io__fwd_8hpp.html">sync_io_fwd.hpp</a></div></div>
<div class="ttc" id="atimer__ev__emitter_8hpp_html"><div class="ttname"><a href="timer__ev__emitter_8hpp.html">timer_ev_emitter.hpp</a></div></div>
<div class="ttc" id="autil_8hpp_html"><div class="ttname"><a href="util_8hpp.html">util.hpp</a></div></div>
</div><!-- fragment --></div><!-- contents -->
<!-- start footer part -->
<hr class="footer"/><address class="footer"><small>
Generated on Thu May 2 2024 23:56:38 for Flow-IPC by&#160;<a href="https://www.doxygen.org/index.html"><img class="footer" src="doxygen.svg" width="104" height="31" alt="doxygen"/></a> 1.9.4
</small></address>
</body>
</html>
